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The Law Enforcement Advancing Data and Science Scholars Program 

A Partnership between NIJ and International Association of Chiefs of Police
Date Published
January 18, 2019

Established in 2014 through a partnership between NIJ and the International Association of Chiefs of Police (IACP), the Law Enforcement Advancing Data and Science (LEADS) Program develops the research capacity of mid-career law enforcement personnel who are committed to advancing and integrating science into law enforcement policies and practice. To accomplish this, merit-based scholarships are competitively awarded to mid-rank officers from agencies of any size and executives from small agencies who have effectively infused research into policy development within their agencies.

Research is a valuable tool for law enforcement agencies. This program aims to identify and nurture the next generation of law enforcement leadership through encouraging the use of evidence-based research to advance criminal justice.

NIJ and IACP have built up a strong group of scholars who are committed to using evidence-based research to strengthen the adjudication of law enforcement within their jurisdictions. NIJ and IACP are currently working on techniques to encourage further collaboration between the scholars and to strengthen the program even further moving forward.


As part of the LEADS program, scholarship recipients participate in a number of activities, including:

  • Attendance at the IACP Conference.
  • Participation in private workshops with NIJ, OJP and IACP leadership.
  • Numerous networking activities between the current and incoming classes of scholars.
  • An opportunity to network with, and learn from, like-minded officers working towards the common goal of improving law enforcement throughout the nation.

Applying to Become a LEADS Scholar

Visit the LEADS application webpage to learn more about eligibility for the program and to see the status of when applications will be accepted. NIJ anticipates seeking more applications in summer 2016. Get started on your materials now!

Scholar Bios

Class of 2019

Scholars -

Civilian - 

Academics - 

Class of 2018

Matthew Barter
Sergeant, Manchester Police Department, Manchester, NH

Sergeant Matthew Barter has been with the Manchester Police Department for 10 years and is currently assigned to the patrol division. He was previously a Task Force Officer with the Bureau of Alcohol, Tobacco, Firearms, and Explosives and Crime Analyst with the Crime Analysis Unit. Detective Barter has implemented numerous evidence-based policing practices within the agency, to include a data-driven hotspot policing concept and violent crime reduction initiatives. Recently, Detective Barter worked to integrate National Integrated Ballistic Information Network (NIBIN) technology and gun crime intelligence into strategic planning processes with law enforcement partners. He holds a master’s degree and bachelor’s degree in criminal justice and is interested in pursuing research regarding police patrol patterns as well as place-based crime. Detective Barter also serves as a SWAT Officer and leads the Tactical Emergency Medical Support Unit.

Luke Bonkiewicz
Police Officer, Lincoln Police Department, Lincoln, NE

Officer Bonkiewicz is a police officer with 10 years of experience in patrol, recruitment, pre-employment interviewing, and background investigations, as well as quantitative research methods and data analysis. He has analyzed data on racial disparities in traffic stops, driver’s license suspension programs, gang intervention initiatives, assault on officer incidents, and use of control incidents. He has also published peer-reviewed research on patrol officer productivity, police response to mental health calls for service, violence in drug markets, and the role of police in disasters and evacuations. Currently assigned to LPD’s Management Services Unit, Officer Bonkiewicz writes LPD’s grants, assists with CALEA accreditation, identifies and develops evidence-based policies and practices, and coordinates research projects involving LPD’s academic partners.

Jason Bruder
Lieutenant, Charleston Police Department, Charleston, SC

Lieutenant Jason Bruder has served the City of Charleston since 2002. He is currently working with City Council and the Mayor’s Office on an external audit of police racial bias. He previously commanded the West Ashley Patrol Team and supervised the Field Intelligence Unit and School Security Response Teams. Lieutenant Bruder also works on numerous process improvements to ensure quality and efficient work by officers. He holds a bachelor’s degree in computer science, a master’s degree in homeland security management from Long Island University, and is a graduate of the 62nd session of the Administrative Officers Management Program at North Carolina State University. Working with LEADS, he hopes to improve the use of police data to improve patrol strategies and officer training.

Tara Coffey
Lieutenant, New York City Police Department, New York, NY

Lieutenant Tara Coffey has proudly served as a police officer with the New York City Police Department for 13 years. She currently leads the Special Projects Section of the Office of Management Analysis and Planning under the Chief of Strategic Initiatives. In her current role, she manages and supports collaborative research projects and data analysis to inform policy recommendations, initiatives and program development. She has recently worked on implementing evidence-based reforms to the Department’s performance evaluation process. During her tenure with the NYPD, Lieutenant Coffey has held patrol assignments, supervised a precinct crime analysis unit, and worked as an analyst for the Real Time Crime Center.

David Dalton
Major, Clearwater Police Department, FL

Major David Dalton has nearly 25 years of law enforcement experience with both the Auburndale (Florida) Police Department and the Clearwater Police Department. He began his career with the Clearwater Police Department in 1996 and is currently assigned as the Support Services Division Commander, with oversight of numerous functions including: personnel, training, budget/fiscal management, property/evidence, and communications. Major Dalton possesses extensive experience in investigations, training, recruitment, policy development, accreditation, community/neighborhood policing, and technology implementation. Major Dalton has been recognized for his commitment to research driven principles, civic engagement, and community partnerships. He maintains strong relationships with research institutions, including the University of South Florida, Department of Criminology. Major Dalton holds both a bachelor’s degree in Criminal Justice and a master’s degree in Criminal Justice Administration from the University of South Florida.

Corey Falls
Superintendent of Public Safety, City of Gresham, Gresham, Oregon

Superintendent of Public Safety, City of Gresham, Gresham, Oregon Superintendent Falls has served in law enforcement since 1998 and is responsible for the oversight of all public safety for the City of Gresham. His duties include implementing evidence-based, data-driven strategies to improve service delivery for police and fire. As a former sheriff and deputy police chief, he has extensive public safety leadership experience. Corey has a post master’s degree in Business, a M.A. in Organizational Management, and a B.S. in Health. Corey is a graduate of the FBI National Academy and PERF’s Senior Management Institute for Police.

Rich Johnston
Staff Sergeant, Barrie Police Service, Canada

Rich Johnston recently began a partnership with BetaGov to conduct a randomized controlled trial (RCT) in the Barrie Police Service, making it one of the first agencies in Canada to run its own RCT. Rich’s efforts were integral in expanding the LEADS program internationally. He holds a master’s in leadership studies from the University of Guelph.

Paul Ladouceur
Chief of Police, Estevan Police Service, Canada

Paul Ladouceur is the Chief of Police with the Estevan Police Service, which was the first Saskatchewan-based department to join the Canadian Society of Evidence-Based Policing (CAN-SEBP). Paul is a recent master's graduate and was a keynote speaker at a recent CAN-SEBP event in Saskatoon to discuss his work and views on evidence-based policing and why his own service has adopted this approach.

Stan MacClellan
Chief Administrative Officer, Durham Regional Police Service, Canada

Stan is responsible for the Strategic Planning and Analytics Reporting branch of the Durham Regional Police Service, which includes oversight of the department’s in-service training. He has worked for two of Ontario's larger police services and has expertise across a broad range of policing issues. He is working towards his doctorate in Policing and Security at Charles Sturt University and holds a bachelor’s from St. Francis Xavier University and an MBA from Queen’s University. He is an executive member of the Canadian Society of Evidence-Based Policing (CAN-SEBP).

Emma O’Flanagan
Lieutenant, Rutgers University Police Department, New Brunswick, NJ

Lieutenant Emma O’Flanagan is a 12-year veteran of the Rutgers University Police Department (RUPD), and has served in various positions throughout the police department. Lieutenant O’Flanagan is currently assigned to the Professional Standards Division, responsible for research and planning, training, compliance, accreditation, policy development, internal affairs investigations, and crime analysis. Lieutenant O’Flanagan holds a bachelor’s and master’s degree in Criminal Justice from Rutgers University and is a recent graduate of the NJSACOP Command and Leadership Academy. Lieutenant O’Flanagan has a wide variety of research interests including practical applications of data analysis, officer wellness, hiring and retention of officers, PTSD, and women in law enforcement.

Paige Valenta
Captain, City of Madison Police Department, WI

Captain Paige Valenta has served with the City of Madison Police Department in Madison, Wisconsin since 1997. The City of Madison Police Department has more than 460 sworn officers and 170 civilian staff. Captain Valenta is currently assigned to oversee the City’s South Police District, one of six police districts in Madison. The South District includes the most diverse zip code in the State of Wisconsin. Captain Valenta also has experience as a detective lieutenant, a patrol sergeant, a detective, a SWAT operator, and a patrol officer. She has a bachelor’s degree from Columbia University.

Chris Vallejo
Lieutenant, Austin Police Department, TX

Commander Chris G. Vallejo is a 26-year veteran of the Austin Police Department and oversees the Northwest Area Patrol Command.  He is excited about implementing evidence-based practices to address crime, measure community sentiment, and organizational effectiveness. Chris serves as an Executive Committee member of the American Society of Evidence-Based Policing, a National Police Foundation Policing Executive Fellow, a Police Advisor to Measure, an Austin-based community research and advocacy group, and is an NIJ LEADS Scholar.  Chris is an avid student of leadership, evidence-based policing, performance-management systems, police officer health and well-being, and 21st-century policing principles. Chris holds a Bachelor of Applied Arts and Science from Midwestern State University with concentrations in constitutional law and political science with Summa Cum Laude honors and is currently pursuing a master’s in criminal justice at Texas State University.​

Daniel Wagner
Deputy Superintendent, City of Cambridge Police Department, MA

C. Daniel Wagner has served the City of Cambridge, MA as a police officer since 1998. He currently holds the rank of Deputy Superintendent and is the Commanding Officer of the Procedural Justice Section, where he leads the Crime Analysis Unit and the Office of Rights and Liberties—a new unit to ensure the Department adheres to the principles of procedural justice and legitimacy as well as fair and impartial policing. Deputy Superintendent Wagner works with passion to reduce crime and social harm, improve police-community relations, and advance policing. He has applied his keen interest in research, data-analytics, and community policing to develop successful crime prevention strategies. He is the founding vice president of the American Society of Evidence-Based Policing, serves on the Bureau of Justice Assistance Criminal Justice Technology Forecasting Group, and is a Policing Fellow at the Police Foundation in Washington DC. He holds a Master’s in Public Administration from the John F. Kennedy School of Government at Harvard University.

Class of 2017

Myron Holubiak
Lieutenant, Tucson Police Department, Tucson, AZ
Lieutenant Myron Holubiak has served the community of Tucson, Arizona since 1998. He is assigned to the Analysis section, which creates data-driven analyses of patrol deployments, criminal intelligence, and other policy, strategic, and operational metrics. Lieutenant Holubiak oversees the CompStat and Research and Analysis units, and the Tucson Real-time Analytical Crime Center (TRACC), which provides tactical intelligence to responding operations units through ad hoc research. Previously, he supervised Audit and Best Practices, which analyzes department-member uses of force and researches industry standards, guiding the design of policies and operational practices. He is a graduate of the University of Arizona.

Aimee A. Haley
Lieutenant, Columbus Division of Police, Columbus, OH
Lieutenant Aimee Haley was sworn in with the Columbus Division of Police in 1997 and has served as the division’s accreditation manager since 2011. In this role she has been responsible for overseeing nearly every policy and publication of the largest municipal police department in the state of Ohio. Comparing those policies with others around the nation and the world has equipped her to identify progressing trends and best practices in law enforcement. She is responsible for quickly evaluating and assessing processes and systems to efficiently ensure continuous improvement of her agency. As the current president of the State of Ohio Accreditation Resource Coalition (SOAR), and assessor for the Commission on Accreditation for Law Enforcement (CALEA), Lieutenant Haley knows the value of a professional peer network and anticipates growing that network both in depth and breadth through her participation in the LEADS program.

Stuart Greer
Lieutenant, Morristown Police Department, Morristown, NJ
Stuart Greer has been a police officer in Morristown, NJ since 1998. He currently holds the rank of lieutenant and serves as Executive Officer of the Support Services Division, where his duties include supervising the Criminal Investigations and Internal Affairs units and serving as the departmental public information officer. He earned a master’s degree in applied criminology and police management from the University of Cambridge in the United Kingdom and is currently working towards a master’s in public administration at New York University. His graduate research focused on improving burglary investigation outcomes through the use of evidence-based checklists. Lieutenant Greer is a founder and board member of the American Society of Evidence-Based Policing, a Policing Fellow at the Police Foundation, and an instructor with the Virginia Center for Policing Innovation, teaching a nationally delivered course on using evidence-based practices to reduce homicide and gun violence to police commanders.

Tim Donohoe
Lieutenant, Reno Police Department, Reno, NV

Lieutenant Tim Donohoe has been with the Reno Police Department for 24 years. He currently serves as the Professional Standards Division Lieutenant, where he leads the Internal Affairs Unit, the Training Unit, the Backgrounds Investigations Unit, and the Hiring and Recruitment Unit. Lieutenant Donohoe has both a Master’s Degree and a Bachelor of Science in criminology and criminal justice. He has been involved in training police officers for over 22 years and has implemented an evidence-based approach to his department’s training.

His past research includes a multi-phased three year analysis of police use of force used to inform department training methods. This analysis included a “force factor method” used to determine the proportionality of officer use of force in relation to citizen resistance. Current research includes the use of a non-equivalent control group being matched on key-aggregate-level factors in order to determine the success of a multi-phased gun violence reduction strategy. These strategies include community outreach efforts, focused deterrence, and problem-oriented policing approaches.  

Chad DePew
Chief of Police for the Kettering Health Network (KHN) Police and Security Department in Dayton, Ohio
The KHN Police and Security Department has over 100 sworn police officers and 45 security/civilian employees and provides police and security services to 13 hospitals and medical facilities in a six-county region in southwest Ohio. Chief DePew is a graduate of the 264th class of the FBI National Academy, the Ohio Association of Chiefs of Police (OACP) Certified Law Enforcement Executive program, the OACP’s Police Executive Leadership College, and the Northwestern University School of Police Staff and Command. Chief DePew holds a bachelor’s in criminal justice from Ohio University, a master’s in criminal justice administration from Miami University, and is currently working on his MBA from Louisiana State University. Chief DePew is also an adjunct professor at Sinclair Community College. He has previously conducted research on drug overdose data collection methods and is currently part of a team researching cardiovascular disease risk factors in police officers. As a LEADS scholar, Chief DePew is honored to have the opportunity to work with other scholars and contribute to research to aid the advancement of the criminal justice field.

Jonas H. Baughman
Sergeant, Kansas City Police Department, Kansas City, MO
Sergeant Jonas Baughman is a 14-year veteran of the Kansas City Police Department (KCPD). A native of the Kansas City area, Sergeant Baughman joined the KCPD after obtaining a B.A. in psychology from Creighton University. He has held assignments in patrol, investigations, and crime and intelligence analysis during his tenure. Sergeant Baughman quickly found crime analysis to be his professional passion, and more than half of his career has been in positions related to crime or intelligence analysis. He has served as a crime analyst, created and supervised the KCPD's first Real-time Crime Center team, and directed a squad of detectives tasked with gang intelligence. Sergeant Baughman's primary interests include spatial analysis and predictive policing, as well as data mining and data visualization. He is also interested in building upon his background in psychology through exploration of wellness programs for America's law enforcement officers, including physical and psychological well-being. Sergeant Baughman feels there is much to be learned by working with international police departments, allowing law enforcement agencies to leverage best practices from across the globe. He looks forward to networking with and learning from others within the LEADS program, and hopes this will ultimately make communities across America, including Kansas City, safer places to call home.

John J. Hall
Captain, New York City Police Department, Bronx, NY
Captain John Hall is the Executive Officer of the 48th Precinct in the Bronx. During his tenure with the New York City Police Department, he has held positions in the Patrol Services Bureau, Narcotics Division, and Policy Office. His current position involves overseeing the administrative functions of the precinct and implementing the department’s new neighborhood policing program. Captain Hall has a bachelor’s degree in biology from Cornell University and holds master’s degrees in public administration and urban informatics from the Harvard Kennedy School of Government and New York University’s Center for Urban Science and Progress, respectively. Captain Hall is interested in predictive analytics and the policy surrounding its use in policing.

Edward Tjaden
Chief of Police, Your Police Department, York, NE
Edward Tjaden began his position as Chief of Police at the York Police Department in October of 2017. Prior to that, he spent the previous 18 years with the Gering Nebraska and Alliance Nebraska Police Departments, where he served as an officer, sergeant, instructor, narcotics investigator in a multi-jurisdictional High Intensity Drug Traffic Area task force, and Lieutenant/Operations Commander. He is a 2016 graduate of Northwestern University’s School of Police Staff and Command and obtained his bachelor’s in criminal justice administration in 2017. His experiences exemplify the "jack of all trades" description often found in rural law enforcement, including patrol, investigations, instruction, drafting and implementing policy, conducting forensic child interviews, planning large, high-risk events, supervising hiring processes, supervising training, and writing and administering grants. He has focused his studies on expanding the understanding that rural law enforcement officers, leaders, and agencies face both unique and typical policing challenges, and believes in addressing those challenges with a combination of academic and practical efforts

Glendalay Garcia
Lieutenant, Hartford Police Department, Hartford, CT
Lieutenant Glendaly Garcia is a Hartford native who has proudly served with the Hartford Police Department for 19 years. She currently commands the Investigative Services Bureau’s Crime Scene Division, which consists of the Crime Scene Unit, Fatality Accident Reconstruction Team, and Identification Unit. Previously, she was commander of the Major Crimes Division. Throughout her career, she has served in various capacities, serving as Chief of Staff and Public Information Officer, and supervising the Background Investigation Unit, Pistol Permit Unit, Domestic Violence Unit, Quality of Life Unit, Auxiliary Services Division, and Patrol. She has a master’s in public policy law and government from Trinity College and a Bachelor of Science in health care (emphasis in respiratory care) from the University of Hartford. She is a graduate of the Senior Management Institute of Police (SMIP) Session 60, the Southern Police Institute’s 137th Administrative Officers Course, and the City of Hartford Middle Management Institute. Lieutenant Garcia is committed to fostering an environment where scientific and technological creativity can contribute to Hartford becoming a leading place to live and work. With the backlogs of evidence in crime labs crippling investigative efforts to successfully apprehend, prosecute, and convict perpetrators, she believes forensic science needs to be acknowledged as the pivot of crime prevention and criminal investigations. Having served as a Crime Scene Detective and now leading command of the Crimes Scene Unit, she is committed to developing and implementing innovative solutions that will improve current practices in processing crime scenes.

Christopher W. Ortiz
Deputy Chief, Glen Cove Police Department, Glen Cove, NY
Deputy Chief Ortiz has served the Glen Cove, New York community for the past 19 years, beginning as a patrol officer and rising through the ranks to Deputy Chief. Currently, he oversees multiple aspects of department operations, including grant procurement, patrol operations, investigations, professional standards, training, data analysis and policy. Chris earned a bachelor’s degree in criminology from John Jay College, a master’s degree in criminal justice administration from Long Island University, and a doctorate in criminal justice policy analysis from the City University of New York Graduate Center/John Jay College of Criminal Justice.  Deputy Chief Ortiz has served as a research investigator on several NIJ projects and has published numerous scholarly articles on police practices. He has also served as a subject matter expert and provided technical assistance to several police agencies on a variety of policing subjects. Deputy Chief Ortiz is a graduate of the FBI National Academy and PERF’s Senior Management Institute in Policing.

Class of 2016

Ken Clary
Captain, Iowa State Patrol, Des Moines, IA
Captain Clary currently serves as an Area Commander for the Iowa State Patrol (ISP), which includes the oversight of four patrol districts including approximately one quarter of the State of Iowa. During his time as a Commander, Captain Clary has held a variety of positions including CALEA Accreditation Coordinator for the Department of Public Safety (DPS) and Assistant Field Operations for the ISP. In these positions, he has utilized research and worked with numerous law enforcement agencies to determine best practices in hiring and promotional processes, as well as resource allocation. Recently, he worked directly with the Iowa Governor’s Traffic Safety Bureau (GTSB) to implement statewide police training and public education programs to combat drowsy driving. Subsequently, in June, Iowa GTSB and DPS hosted the first of its kind National Drowsy Driving Summit with the National Highway Traffic Safety Administration (NHTSA).

Jeffery Egge
Sergeant, Minneapolis Police Department, Minneapolis, MN
Sgt. Jeffery Egge currently serves as supervisor of Strategic Analysis for the Minneapolis Police Department (MPD) and specializes in the study of homicide, gang crime, hot spots, and research translation. With MPD, Sgt. Egge has worked in CompStat, Organized Crime, Homicide, and Patrol. Sgt. Egge holds a master’s degree in police leadership, administration, and training from the University of St. Thomas, and a bachelor’s degree in organizational management from Concordia University. He was a Senior Research Fellow at the Police Executive Research Forum (PERF) and has contributed to publications on crime analysis, research and planning, and predictive policing. Jeff has presented at national symposia for the Center for Evidence Based Crime Policy, Police Executive Research Forum, and the International Association of Crime Analysts. Prior to joining the MPD, he was an Investigations and Training Specialist and Loss Prevention Manager for Dayton Hudson (now Target Corp).

Joan Fiesta
Lieutenant, University of Illinois Police, Urbana, IL
The University of Illinois Police Department is a fully sworn department that serves a community of over 45,000 students and 6,000 faculty and staff members. Lieutenant Fiesta currently serves as the administrative bureau commander, overseeing the crime prevention, training, telecommunications, and records units. The University is a rich environment for research and educational opportunities; Fiesta connects researchers from various disciplines to the department. The results of the research help the department develop evidenced-based training and practices. Lieutenant Fiesta holds a bachelor’s degree in rhetoric with a minor in Russian from the University of Illinois and a master’s degree in organizational leadership from Gonzaga University.

Jeremiah Johnson
Sergeant, Darien Police Department, Darien, CT
Sergeant Johnson has served the Town of Darien (CT) for the last sixteen years. During his time as a detective sergeant, he leveraged research to increase his agency’s investigative capacity by cross-training a subset of patrol officers to function as detectives. In his current role as a night shift supervisor, he lead a multi-site randomized controlled trial to test the relationship between enhanced patrol vehicle lighting and crime. Sgt. Johnson holds a bachelor’s degree in sociology from Geneva College, a master’s degree in justice administration from Western Connecticut State University, a master’s degree in criminal justice from John Jay College, and a doctorate in criminal justice from the City University of New York Graduate Center. His dissertation research focused on the role of relational networks in diffusing law enforcement innovations.

Obed Magny
Police Officer, Sacramento Police Department, Sacramento, CA
Officer Magny is currently assigned to the Sacramento Police Department’s Professional Standards Unit where he is responsible for writing and updating agency policies and procedures. Officer Magny has a bachelor’s degree in criminal justice and sociology, a master’s degree in emergency services administration, and a doctorate degree in organizational leadership. Officer Magny’s research interests are in the field of motivation, job satisfaction, diversity, and emotional intelligence. Officer Magny is a strong proponent of applying scientific research in the field of policing. Officer Magny is fellow at the Police Foundation and a founding member of the American Society of Evidence Based Policing (ASEBP). Officer Magny is also an adjunct professor at Brandman University.

Ivonne Roman
Captain, Newark Police Department, Newark, NJ
Captain Roman currently commands the Criminal Investigations Bureau (CIB). CIB consists of the following units: Homicide, Major Crimes, Robbery, Special Victims, Youth Aid, Auto Squad, Crime Scene, Ballistics, Criminal Intelligence Unit, Real Time Crime Center, and the Narcotics Unit. Roman earned a master’s degree in public administration from Rutgers University.

Newark Police is currently operating under a Federal Consent Decree. Roman is interested in research on police perceptions of legitimacy and procedural justice. Extant literature thoroughly explores citizens’ perceptions of legitimacy, but there is a dearth of research regarding officers’ perception and factors that influence those perceptions. Understanding both officers’ and citizens’ perceptions on these topics can have broad applications when implementing recommendations from the President’s Task Force on 21st Century Policing.

Daniel Stewart
Captain, Oklahoma City Police Department, Oklahoma City, OK
After joining the department in January 1999, Captain Stewart spent the early part of his career in patrol and served as a field training officer, firearms instructor, and control and defensive tactics instructor. He spent several years in Recruiting before being promoted to the rank of lieutenant in 2009. He spent four years in Operations before being assigned to the Planning and Research Unit. During this assignment, Daniel surveyed other law enforcement agencies and conducted thorough research on topics that benefited the department, such as vehicle equipment and early intervention systems. Additionally, he helped to develop written directives on critical projects such as body-worn cameras and Naloxone. He was promoted to the rank of Captain in 2015.  As Captain, he spent time in Operations as a Shift Commander and in Investigations as the Property Crimes Commander. Currently Captain Stewart is assigned to the Administration Bureau where he oversees Planning and Research, Fleet Management, Staff Inspections and CALEA Accreditation.  

Greg Stewart
Sergeant, Portland Police Bureau, Portland, OR
Greg Stewart is a sergeant with the Portland, Oregon, Police Bureau (PPB). His 20 years of service include being a patrol officer, patrol sergeant, and investigative sergeant. He supervised the Bureau’s Domestic Violence Reduction Unit and implemented an automated actuarial risk assessment system for domestic violence offenders. He is currently the sergeant of the PPB’s Crime Analysis Unit. His assignments include developing patrol strategies aimed at reducing crime while improving the relationship between police and community members and supervising PPB non-sworn crime analysts. In this capacity, he assists the PPB in operationalizing existing police-related research as well as conducting research on emerging issues.

Wendy H. Stiver
Major, Dayton Police Department, Dayton, OH
Major Stiver is the commander of the Central Patrol Division at the Dayton (OH) Police Department. She has also served as the commander of the Central Investigations Bureau and in both East and West Patrol Divisions. She holds a master’s degree in criminal justice from the University of Cincinnati. She is also a graduate of the Police Executive Leadership College and Certified Law Enforcement Executive course. Major Stiver is an adjunct professor at Wright State University and teaches graduate courses in criminological theory. In addition to a current research project on police intervention in infant mortality cases, Major Stiver led a foot patrol evaluation with the University of Cincinnati, quantitative analysis on patrol officer exposure to secondary trauma and is working on a volunteer hot spot patrol project, photo enforcement compliance and a sentinel event crash reduction multi-disciplinary team review.

Rachel Tolber
Sergeant, Redlands Police Department, Redlands, CA
Sergeant Tolber has served the Redlands, California, community for 18 years. She is currently assigned to the Professional Standards Unit, where she is responsible for conducting all internal investigations, investigating citizen’s complaints, and overseeing the concealed weapons licensing process. Sergeant Tolber earned her bachelor’s degree in psychology and sociology from the University of Redlands and her master’s degree in criminology, law, and society from the University of California, Irvine. Most recently, she earned a master’s degree in applied criminology and police management from the University of Cambridge, United Kingdom. During her course of study at the University of Cambridge, she examined the feasibility of conducting a randomized controlled trial to test restorative justice among the parole population in Redlands. She is also a fellow at the Police Foundation, an adjunct instructor of criminal justice at Chaffey College, and a founding member of the American Society of Evidence-Based Policing.

James T. Williams
Sergeant, Metro Nashville Police Department, Nashville, TN

Sergeant Williams is the supervisor over the DUI Enforcement Unit for the Metropolitan Nashville Police Department. During his time with the department, he has served as an officer in patrol, Crash Investigator and Reconstructionist, and patrol supervisor. In his current position, Sergeant Williams is responsible for analyzing crash and arrest data pertaining to driver impairment and develops intervention strategies. He also supervises the investigation of crashes involving life-threatening injuries and fatalities. Sergeant Williams has a bachelor’s degree in sociology from the University of Kentucky and a master’s degree in Public Policy and Administration from Northwestern University. For his master’s thesis, Sergeant Williams researched the use and effectiveness of predictive analytics to inform enforcement strategies aimed at reducing traffic-related deaths and offenses.

Class of 2015

Shon Barnes
Deputy Chief, Salisbury Police Department, Salisbury, NC
Major Shon F. Barnes is a valued member of the Salisbury Police Department (NC) and serves as the Deputy Chief of Police. His duties include implementing stratified policing (an evidence-based crime reduction model) and overseeing the department’s community policing strategies. Major Barnes has completed a quasi-experimental research project regarding the implementation of predictive policing analytics. These analytics are built upon a meta-analysis predictive policing algorithm, based on five years of reported crime data in an effort to reduce crime. His current research, in association with North Carolina Agricultural and Technical State University, focuses on the role of hot spot policing and the impact this strategy has on racial disparities in traffic stop data. Findings from this research have guided recommendations for other law enforcement agencies. Major Barnes credits the LEADS program and the IACP conference with bridging the gap between research and practice.

Erin Freidline
Lieutenant, Riley County Police Department, Manhattan, KS
Lieutenant Freidline is currently assigned to the Patrol Division of the Riley County (KS) Police Department. Within this division, Lieutenant Freidline uses data and intelligence to increase the effectiveness of their officers through using hot spot policing to try and deter and prevent crime with our intelligence unit providing a minimum of weekly updates about crime trends. As a LEADS scholar, Lieutenant Freidline has gained a new network of mid-level supervisors to communicate with in reference to solving crime problems and sharing ideas. She is also appreciative of the wealth of knowledge available through NIJ and their website, who are working just as hard to progress law enforcement in a positive direction.

Tarrick McGuire
Lieutenant/Sector Commander, Arlington Police Department, Arlington, TX
Tarrick McGuire, a native of Dallas, TX, has a B.S. in Speech Communications from Oklahoma State University and an M.S. in Leadership from Criswell College. Currently he serves as a Lieutenant for the Arlington (TX) Police Department with a diverse law enforcement background in criminal investigations, personnel and recruiting, tourism policing, and police operations. As Director of Mentoring Arlington Youth, he is working to increase legitimacy among young men in communities of color and conducting research on ways to reduce juvenile recidivism. As a LEADS scholar he has been able to enhance his law enforcement knowledge incorporating best practices in programs and policy in his organization.

Cory Nelson
Lieutenant, Madison Police Department, Madison, WI
Lieutenant Nelson is currently in charge of the Professional Standards and Internal Affairs Office within the Madison (WI) Police Department, a department of approximately 450 commissioned and 150 civilian employees. Having never been to the IACP Conference previously, Lieutenant Nelson came away from the event very impressed; with the major take away being the importance of using data and research to make departments more efficient. After the conference, Lieutenant Nelson contacted an academic researcher at a college in Wisconsin and explained his plan to implement a domestic violence initiative that targets offenders. Lieutenant Nelson and the researcher plan on beginning research and discussions in January 2016.

Jason Potts
Lieutenant, Vallejo Police Department, Vallejo, CA
Jason Potts has over 20 years of law enforcement experience. He is a Lieutenant with the Vallejo Police Department where he has served for 18 years & currently assigned to the patrol division as a watch commander where he leads the department’s field training program. Jason is also a military Reserve Special Agent with the Coast Guard Investigative Service (CGIS) and routinely travels to Fort Leonard Wood Missouri to assist with the instruction of trauma-informed interviewing techniques to military agents. Jason has completed two randomized controlled trials (RCT) in his department – one testing the effectiveness of automatic license plate readers and the other testing the deterrent effects of code-2 lights on auto burglaries and theft in a high-density shopping center. In addition to the above, Jason conducted a quasi-experiment on theft deterrent strategies during the holiday shopping season where a multitude of interventions were tested. He, along with another police practitioner recently implemented a third randomized experiment – launched at the annual ASEBP conference to test how virtual reality training may inform future police training.

He is a strong advocate for evidence-based policing (EBP) and serves on the board of directors for the American Society of Evidence-Based Policing (ASEBP), is a Police Foundation Fellow, a BetaGov Fellow with NYU, and a National Institute of Justice (NIJ) LEADS alumni. He has written and presented nationally about his experiences implementing EBP.  Jason earned a Master of Advanced Studies (MAS) in Criminology, Law, and Society from the University of California - Irvine. He holds a certificate of completion from the Police Executive Research Forum, Senior Management Institute of Police #68, 2018.

Nicole Powell
Sergeant, New Orleans Police Department, New Orleans, LA
As a sergeant of Deputy Superintendent Rannie Mushatt’s staff, Sergeant Powell’s main role is a liaison between the Investigation and Support Bureau and the Public Integrity Bureau. Sergeant Powell’s responsibilities include assigning, tracking and monitoring all internal investigations. She assists in the conduct of disciplinary hearings, preparing vital notifications and pertinent paperwork. She also reviews staffing requirements, court attendance, policy compliance and training. In addition to those duties, Sergeant Powell conducts quarterly reviews of sex crime cases per the consent decree. Sergeant Potts believes that participating in the LEADS scholar program has been truly an amazing experience. She has gained a new perspective about partnerships related to evidence-based approaches in leadership roles and the need for effective community policing. She was honored to interact with OJP Assistant Attorney General Karol Mason and NIJ Director Dr. Nancy Rodriquez at the IACP Conference, and she looks forward to gaining knowledge and experience in continuing participation in the LEADS scholar program.

Sheryl D. Victorian
Lieutenant, Houston Police Department, Houston, TX
Lieutenant Victorian is assigned to the Special Victims Division – Child Sexual Abuse Unit within the Houston (TX) Police Department. In this position, Lieutenant Victorian is responsible for managing the day-to-day operations of personnel investigating sexual offenses involving child victims and child perpetrators. Lieutenant Victorian earned a doctor of philosophy degree from Texas Southern University in Administration of Justice. Her research interests include police leadership, police-community relations, and police ethics. As a result of her experience thus far as a 2015 LEADS scholar, Sheryl understands how critical her role is as both a law enforcement officer and scholar in positively affecting policy through research.

Joshua Young
Corporal, Ventura Police Department, Ventura, CA
Joshua Young is a corporal with the Ventura (CA) Police Department. During his time with the department, he has worked as an undercover police detective and tactical operator on the department’s SWAT team.

Cpl. Young is an internationally recognized subject matter expert on body-worn camera technology. He was the principal investigator in a 12-month randomized controlled trial at the Ventura Police Department, which was the first known attempt to empirically test the effects of body-worn video cameras on prosecution outcomes. He has also provided training and policy recommendations on body-worn camera technologies to law enforcement agencies in several countries.

Cpl. Young has a master’s degree in criminology and police management from the University of Cambridge. He is also a Fellow at the Police Foundation; an adjunct instructor of Criminal Justice at Ventura College; and a founding member of the American Society of Evidence-Based Policing.

Cpl. Young credits the LEADS program for bringing research-oriented officers together with NIJ leadership to collaborate on new ideas to improve American policing.

Class of 2014

Daniel P. Brauer
Lieutenant, Glendale Police Department, Glendale, WI
In addition to his role as a patrol lieutenant serving the Glendale Police Department, Lieutenant Brauer maintains a number of other responsibilities including: TRACS administrator/trainer, department grant writer, promotional assessor, accreditation manager, dispatch center liaison, TIME System TAC, and RMS administrator/trainer. While the LEADS program may be still in its infancy, Lieutenant Brauer has already received tremendous value from the program. He feels that the combination of NIJ, the IACP, and LEADS scholars has created a brain trust that will lead to research-based innovation, problem solving, and the continued professionalization of law enforcement. He is honored to have this opportunity to work with some of the most dedicated, insightful, and intelligent members of the law enforcement community.

Gary Eblan
Sergeant Detective, Boston Police Department, Boston, MA
The Boston (MA) Police Department is a stalwart supporter of community policing strategies reflecting the values of the visitors and residents of Boston. As the Registrar of the Police Academy, Sergeant Detective Gary J. Eblan, M.A., has spent more than 16 of 26 years involved in the creation, design, implementation and execution of all facets of police training. The LEADS program has allowed him to expand his knowledge and resource base, and bring innovative ideas back to the Boston Police Department. Sergeant Detective Eblan now works as an investigator in the Bureau of Professional Standards, Anti-Corruption Division.

Mark Landahl
Sergeant, Frederick County Sheriff’s Office, Frederick, MD
Sergeant Mark Landahl, Ph.D., serves as the Supervisor of the School Resource Unit within the Homeland Security Section of the Frederick County (MD) Sheriff’s Office. The 13 Deputies of the School Resource Unit provide law enforcement services to the more than 46,000 students and staff in 67 schools in the 664 square miles of Frederick County. Participation in the NIJ LEADS program provided access to law enforcement experts dealing with the latest challenges in the field and access to evidence-based practices in school-based policing that helped to improve service delivery in Frederick County.

James Mac Gillis
Lieutenant, Milwaukee Police Academy, Milwaukee, WI
Lieutenant Mac Gillis serves as his agency’s training lieutenant and also conducts training research for the agency. Since being selected as a LEADS scholar, Lieutenant Mac Gillis has had the opportunity to network with the Las Vegas (NV) Metro Police Department and the Washington State Police Academy; recently he has conducted a research presentation for the Shanghai, China Police College. This program is about researching best practices and sharing knowledge and experiences to improve our profession. One of the most important outcomes from this experience is that agencies must have strong executive decision-making that is evidence-based and backed by scholarly research, but must also involve those at the practical application level. LEADS is that essential practical component.

Louis A. Molina
Senior Advisor for Security & Emergency, New York City Department of Homeless Services, New York, NY
As senior advisor to the agency, Mr. Molina provides strategic advisement and expert consultancy on all security and emergency operations within the agency to include the agency’s 700+ Peace Officer force. Mr. Molina has over 16 years of law enforcement and public safety experience that includes his work with the New York City Police Department, as senior police instructor with the U.S. Department of State, and as New York University Department of Public Safety and Deputy Chief with Kings County District Attorney’s Office prior to being appointed senior advisor at NYC Department of Home Services. The NIJ LEADS program connected him with other law enforcement experts from across the U.S. who contributed to his process in transitioning the agency’s police culture from an occupational to a professional mindset using evidence-based practices to enhance investigations and public safety.

James Nolette
Captain, Fayetteville Police Department, Fayetteville, NC
The Fayetteville (NC) Police Department has 443 sworn employees with an additional 200 non-sworn employees for a total of approximately 650 employees. Captain Nolette is currently assigned to the position of Executive Officer for Chief Harold Medlock and holds the rank of Captain. As part of his responsibilities in this position, Captain Nolette oversees the day-to-day operations of the Fayetteville Police Department Crime Intelligence Center (CIC). The CIC is the agency’s operations center for all major investigations, incident command center and crime analysts. Each week, the CIC embeds itself into all major “trend” or “spree” crimes, and it utilizes research and technology in a way that streamlines the investigative and policing processes as to allow for the system to run smoother. The LEADS program has allowed Captain Nolette to have a network of contacts who are focused on the future of policing while maintaining contact with the day-to-day operations that are required to maintain a strong presence in the field of traditional policing.

Read more about Captain Nolette’s experience in the LEADS program in the NIJ Journal article Using Research to Move Policing Forward.

Edward Pallas
Lieutenant, Montgomery County Police Department, Gaithersburg, MD
Lieutenant Edward Pallas has been a police officer with the Montgomery County (MD) Department of Police for 21 years. He is currently the Deputy Director of the Major Crimes Division and is also a member of his department’s Emergency Response Team, where he has served as a conflict/hostage negotiator for the last 15 years.

Lieutenant Pallas earned his bachelor of arts in criminal justice from the University of Maryland, College Park, and his master of science in management from Johns Hopkins University. He earned his doctor of education in organizational leadership and innovation at Wilmington University. His dissertation research investigated the relationship between emotional intelligence, leadership style, and effectiveness in police supervisors. Lieutenant Pallas is a certified IACP Master Instructor in both the Leadership in Police Organizations℠ program and the Iraqi Police Education Program.

He is also a certified practitioner in the Myers Briggs Personality Type Indicator and the Emotional Intelligence Inventory. As a LEADs scholar he has networked with and explored the research of other police professionals from across the country. He believes the LEADS scholarship program will continue to bridge the gap between practical application and academic research required of 21st century law enforcement leaders.

Charlie Thorpe
Captain, Sarasota County Sheriff’s Office, Sarasota, FL
Captain Charlie Thorpe is a 25-year veteran of the Sarasota County (FL) Sheriff's Office. His current assignment is bureau commander of the agency's Investigations where he oversees over 100 sworn and civilian employees involved in criminal investigations, intelligence, homeland security, forensic services, victim advocacy, crime analysis and support for these sections. Captain Thorpe completed his master’s degree in Criminal Justice Administration through the University of South Florida at Sarasota-Manatee while serving as the Lieutenant of the Intelligence Section. In this position, he developed a strong interest in regional collaboration with other agencies and with academia in order to promote intelligence-led policing practices for crime prevention. Captain Thorpe developed the Sarasota County Sheriff’s Office current program of "Intelligence 2 Action," which places a strong emphasis on analysis-supported response to crime and hazards. The collaboration with other agencies has resulted in the area law enforcement exchange, or "ALEX" program, that has considerably enhanced information and intelligence sharing among local, state and federal law enforcement in the southwest region of Florida. Captain Thorpe takes a special interest in the effect of repeat or "prolific" offenders on crime in a community. His research in this area led to his pursuit of involvement in the LEADS program. The LEADS program has become a quick success in promoting the importance of academic/practitioner relationships in building solid and efficient practices for daily policing in our nation. As this program continues, Captain Thorpe suspects the benefits will become something to behold; but the networking relationships among the LEADS scholars and their new research contacts have already proven to be exceptional.

National Institute of Justice, "The Law Enforcement Advancing Data and Science Scholars Program ," January 18, 2019, nij.ojp.gov:
Date Created: January 18, 2019