Police research

In 2014, NIJ established the Law Enforcement Advancing Data and Science (LEADS) Scholars Program to support research-minded, mid-career sworn law enforcement officers working to integrate research into agency policy and practice. The LEADS Scholars Program helps participants develop independent research and provides support to identify current evidence on priority issues.

Police use of force, while infrequently used, is a tremendous concern to public safety in the United States when officers employ it excessively or inappropriately, causing injury or death and eroding public trust in law enforcement. This plenary from the 2023 NIJ Research Conference describes the Integrating, Communications, Assessment, and Tactics (ICAT) de-escalation training program developed by the Police Executive Research Forum to guide officers in defusing critical incidents.

This panel will discuss what inclusive research is, how to conduct it, and what issues and challenges exist about engaging in it. “Inclusive research” has its history as a participatory research method designed to ensure people closest to the issue or problem under study are authentically engaged in the research process rather than simply being “research subjects.” While community-based participatory research has begun to take on greater prominence in the criminal justice realm, such efforts are largely confined to qualitative research inquiries.

The theme of NIJ’s 2023 Research Conference was “evidence to action,” and our goal was to bring researchers and practitioners together to learn about the latest research evidence and how it can be implemented to promote safety, equity, and justice.

The opening ceremony included remarks from U.S. Attorney General Merrick B. Garland, Assistant Attorney General for the Office of Justice Programs Amy Solomon, and NIJ Director Nancy La Vigne.

On February 16-18, 2021, the National Institute of Justice hosted the Virtual Conference on School Safety: Bridging Research to Practice to Safeguard Our Schools. This video presents a roundtable discussion from that conference.

On February 16-18, 2021, the National Institute of Justice hosted the Virtual Conference on School Safety: Bridging Research to Practice to Safeguard Our Schools. This video includes the following presentations: 

On February 16-18, 2021, the National Institute of Justice hosted the Virtual Conference on School Safety: Bridging Research to Practice to Safeguard Our Schools. This video includes the following presentations: 

On February 16-18, 2021, the National Institute of Justice hosted the Virtual Conference on School Safety: Bridging Research to Practice to Safeguard Our Schools. This video includes the following presentations: 

In recent years, NIJ invested in several research projects to advance understanding and inform prevention of public mass shootings.

Cory Haberman, Assistant Professor, University of Cincinnati, discusses his work as an NIJ LEADS Academic and the value of having training researchers working directly with law enforcement agencies. 

Captain Ivonne Roman, Newark (NJ) Police Department, describes how her participation in NIJ’s LEADS Program has helped her research on women in policing, some of her findings, and describes how LEADS has benefited her career growth.

John Violanti, research professor at University at Buffalo’s School of Public Health and Health Professions; Wendy Stiver, major at the Dayton (Ohio) Police Department; and Dan Grupe, associate scientist at University of Wisconsin’s Center for Healthy Minds, speak about how the law enforcement culture of not showing weakness might deter some officers from getting help if they are suffering from mental health issues. The subject matter experts recommend listening to officers and conveying that it’s okay to express emotions.

At this Research for the Real World seminar, NIJ brought together law enforcement practitioners and leading researchers in the field of stress to discuss the current research evidence and practical benefits of targeted stress-management interventions and how they can promote officer mental wellness.

This video, produced for IACPTV, provides an overview of the NIJ Law Enforcement Advancing Data and Science (LEADS) program. NIJ LEADS Scholars from Dayton and Newark police departments provide an overview of the LEADS program as they describe their projects and experiences working in the program.

Hear from LEADS scholars Major Wendy Stiver, Dayton Police Department, and Captain Ivonne Roman, Newark Police Department.

What does science tell us about case factors that can lead to a wrongful conviction? Dr. Jon Gould of American University will discuss the findings of the first large-scale empirical study that has identified ten statistically significant factors that distinguish a wrongful conviction from a "near miss." (A "near miss" is a case in which an innocent defendant was acquitted or had charges dismissed before trial). Following Dr. Gould's presentation, Mr. John R.

Change doesn't come easy, particularly within an institution as large and complex as the criminal justice system. Greg Berman, Director of the Center for Court Innovation, offered lessons from several efforts to make reform stick in criminal justice settings. In particular, he focused on the development of community courts — experimental court projects that are attempting to reduce both crime and incarceration in dozens of cities across the U.S. and around the world.

Law enforcement agencies can use research-based practices to manage protests and civil disturbances more effectively. In this video, Dr. Tamara Herold, Associate Professor, University of Nevada, Las Vegas, and Ryan Lee, Assistant Chief, Portland Police Bureau, discuss some of those methods, some of the misconceptions about how law enforcement should respond to civil disturbances, and where agencies should begin when developing civil disturbance response plans. 

Professor Christopher Stone recently completed a study of police-on-police shootings as part of a task force he chaired in New York State. He reported on his findings and recommendations, exploring the role of race in policing decisions, methods to improve training and tactics to defuse police-on-police confrontations before they become fatal, and methods to improve the investigations of such shootings.

Bill King discusses the operations of the National Integrated Ballistic Information Network (NIBIN), a program through which firearms examiners at state and local crime laboratories compare tool marks on fired bullets or cartridges found at a crime scene to digitized images of ballistic evidence in a nationwide database.

Professor Lawrence Sherman explains how policing can prevent far more crimes than prison per dollar spent. His analysis of the cost-effectiveness of prison compared to policing suggests that states can cut their total budgets for justice and reduce crime by reallocating their spending on crime: less prison, more police.