Forensic sciences

The reauthorization of hemp due to the Agriculture Improvement Act of 2018 (Farm Bill) has caused a proliferation of products that contain cannabidiol (CBD). While CBD is considered ‘legal’ under the Farm-Bill, there are concerns that the labeling of CBD products is inaccurate, and that the products may contain other cannabinoids, including Δ9-tetrahydrocannabinol (THC), the main psychoactive compound in marijuana. Other concerns include the potential for conversion of CBD to other cannabinoids during analysis of biological matrices and in acidic foods and beverages.

Dr. Julie L. Valentine provides background information on the challenges in tracking prosecution outcomes in sexual assault cases of adult victims. Research utilizing the National Institute of Justice Sexual Assault Nurse Examiner Practitioner Toolkit in two Utah counties is presented. Variables predicting prosecution are be explored. Participants are invited to consider societal, structural, and legislative barriers to prosecution of adult sexual assault cases faced in their jurisdiction to encourage multidisciplinary collaboration.

Dr. Julie L. Valentine introduces the application of touch DNA in sexual assault cases through a case study. A literature review on touch DNA is summarized to provide contextual information and research on touch DNA analysis findings in groping sexual assault cases is discussed. The webinar concludes with recommendations for multidisciplinary partners to collect, submit, and analyze evidence in sexual assault cases for touch DNA.

This webinar was hosted by the NIJ Forensic Technology Center of Excellence on April 18, 2023.

Dr. Julie Valentine shares background information on dating app usage and user demographics to provide context for research findings on dating apps and sexual assault. Research findings are presented on sexual assaults committed at the first in-person meeting when the victim and assailant met on a dating app compared to other sexual assaults not associated with dating apps. Practice and policy recommendations are shared to improve dating app safety.

This webinar was hosted by the NIJ Forensic Technology Center of Excellence on April 4, 2023.

One of the biggest challenges that Forensic Laboratories face is hiring and retaining great employees. The loss of one person has a domino effect on the operations of the laboratory and has a direct impact on the departments they serve. This presentation outlines some of the ways that the Mesa Forensic Services Laboratory and the Texas Department of Public Safety Crime Laboratory Division have been able to hire and retain great employees. 

This webinar was hosted by the NIJ Forensic Technology Center of Excellence on March 14, 2023.

Change can be intimidating and making a transition to a paperless system can be daunting task. This presentation discusses two perspectives on how laboratories embraced technology for administrative and casework processes, the lessons learned, and the vision for additional growth.

This webinar was hosted by the NIJ Forensic Technology Center of Excellence on February 2, 2023. 

This webinar presents laboratory managers with a discussion on case management in forensic science laboratories. All forensic science laboratories struggle with caseloads and backlogs in some way and to varying extremes. The answer to this struggle is a process to manage caseloads through evidence triage, case information management, and communication. A discussion on the challenges involved in case management is followed by practical experiences in writing and implementing case management policies.

The Forensic Technology Center of Excellence assisted the National Institute of Justice in hosting the annual NIJ Forensic Science Research and Development Symposium on Tuesday, February 18, 2025 at the 77th Annual American Academy of Forensic Sciences meeting in Baltimore, Maryland. This video is one of five recorded sessions from the event. 

Presentations include -

The Forensic Technology Center of Excellence assisted the National Institute of Justice in hosting the annual NIJ Forensic Science Research and Development Symposium on Tuesday, February 18, 2025 at the 77th Annual American Academy of Forensic Sciences meeting in Baltimore, Maryland. This video is one of five recorded sessions from the event. 

Presentations include -

The Forensic Technology Center of Excellence assisted the National Institute of Justice in hosting the annual NIJ Forensic Science Research and Development Symposium on Tuesday, February 18, 2025 at the 77th Annual American Academy of Forensic Sciences meeting in Baltimore, Maryland. This video is one of five recorded sessions from the event. 

Presentations include - 

The Forensic Technology Center of Excellence assisted the National Institute of Justice in hosting the annual NIJ Forensic Science Research and Development Symposium on Tuesday, February 18, 2025 at the 77th Annual American Academy of Forensic Sciences meeting in Baltimore, Maryland. This video is one of five recorded sessions from the event. 

Presentations include - 

A roadmap to successfully utilizing contract forensic pathologists, also known as locum tenens, was presented by a Chief Medical Examiner and a Coroner with extensive experience in employing these useful contractors to perform forensic autopsies and other professional tasks in today’s environment of increasing caseloads. Topics include the forensic pathologist workforce shortage, scheduling, budgeting, fee structures, and different business models for the use of locum tenens forensic pathologists in busy Medical Examiner and Coroner offices. \

A world in crisis and a 24/7 media cycle demands consistent, clear, and effective communication from organizations tasked with death investigation and related responsibilities. Two seasoned professionals share their experiences reaching diverse stakeholders and engaging the public in the vital work of the largest medical examiner’s office in the country.

This webinar was hosted by the NIJ Forensic Technology Center of Excellence on November 28, 2023.

Part I: GeoFOR is a free web-based collaborative forensic taphonomic application and database that utilizes geospatial technology and machine learning to deliver data-driven postmortem interval estimations to better facilitate identification and reconstruct events around the time of death. This presentation describes the geoFOR application and its potential for advancing the field of forensic science.  

This presentation explores the issue of lawfully “owed” DNA, which is a DNA sample from a qualifying offender who should have their DNA sample in CODIS (based on applicable state law), but from whom a sample has never been collected or submitted to a lab for testing.

This webinar shares insight into why it is important to have a positive quality culture within a laboratory. Attendees see how establishing a culture where the proactive pursuit of quality is a positive for a laboratory. When actively pursuing quality, staff will help management navigate and be successful during the time of change. The presentation discusses how change, whether small or large, can be perceived and affect employees differently, and will provide some strategies on how to mitigate the effect change could have on their employees.

This webinar introduces attendees to the Organization of Scientific Area Committees for Forensic Science (OSAC) Registry of Standards, the International Organization for Standardization (ISO) Technical Committee (TC) on Forensic Science, and the Academy Standards Board (ASB). Attendees learn about forensic science standard development in the national and international space as well as standard implementation tools provided by the National Institute of Standards and Technology (NIST) and the American Academy of Forensic Sciences (AAFS).

Adopting new technology, particularly new software, can often present unforeseen challenges to business owners who have limited experience with this process. In a laboratory setting, leaders not only need to prepare staff for change, but they need to strategically plan for product implementation up to two years before release.

Successful leadership is more than just managing people—it’s about assembling the right team, placing individuals in roles where they thrive, and fostering a culture of accountability and collaboration. This session explores key leadership principles based on the concept of "getting the right people on the bus" and ensuring they are in the right seats. Strategies for identifying talent, aligning team strengths with organizational goals, and creating an environment where individuals feel empowered to contribute their best are discussed.

While forensic DNA analysis can identify an individual(s) at a crime scene, it cannot identify the biological source from which that DNA was obtained – e.g. blood, saliva, or semen. Identification of the biological source of DNA can provide important contextual information for forensic investigations as well as evidence in court. Nearly all current methods used for body fluid identification are presumptive. Here we present a new proteomic mass spectrometry method for the confirmatory identification of blood, saliva, and semen.

It is well-known that bloodstain pattern analysis (BPA) on textiles is difficult and subject to many errors or misinterpretations. In this webinar, we probe the reason for this and suggest useful information that a bloodstain pattern analyst may be able to extract from the observed bloodstains. The data set demonstrates the roles of drop volume and impact speed in bloodstain formation on textiles.

This webinar was hosted by the NIJ Forensic Technology Center of Excellence on December 12, 2023. 

As evident by the Cannabinoid Connundrums webinar series, the rapidly changing world of cannabinoids offers many conundrums. To tackle some of these questions, Dr. Ruth Winecker led a panel discussion with Dr. Ed Cone, Dr. Nathalie Desrosiers, Mr. Justin Poklis, and Mr. Nelson Santos. This diverse slate of thought leaders includes experts in analytical chemistry, forensic toxicology, clinical research, and drug chemistry. This webinar was hosted by the NIJ Forensic Technology Center of Excellence on August 3, 2023. 

Controlled drug administration studies are valuable tools for acquiring a detailed understanding of the pharmacodynamic and pharmacokinetic profiles of cannabinoids. ∆9-tetrahydrocannabinoid (THC) is the primary psychoactive cannabinoid in cannabis with the potential to negatively impact cognitive and psychomotor performance and workplace safety. These studies establish behavioral and subjective effect profiles while simultaneously collecting pharmacokinetics data.

This webinar addresses a common cross-cultural issue experienced every day in the crime laboratory and within the greater criminal justice community, the generation gap. Simply defined as the different outlooks or opinions between individuals of different generations, this complex topic can create division within a workforce or, if understood, can elevate personnel to achieve organizational goals.

THC isomers, also known as THC analogs or semi-synthetic cannabinoids, are structurally related to Δ9-tetrahydrocannabinol (Δ9-THC) and have similar toxicity and impairing effects. A recent study indicated that Δ8-THC use was around 27% of marijuana use, based on detection and ratios of cannabinoid metabolites in workplace drug testing. Other analogs of interest include hexahydrocannabinol (HHC) and THC-O. THC isomers are generally perceived as legal and are also seen in states with legal marijuana.