Forensic sciences

Not every crime scene will have definitive evidence, such as DNA, to link an individual to a crime. In those cases, law enforcement relies on other evidence to build the burden of proof. NIJ graduate research fellow Dr. Shelby Khandasammy developed a tool to analyze organic gunshot residue and distinguish between different firearms calibers and manufacturers. She joins Marie Garcia, office director for the Office of Criminal Justice Systems at NIJ, to talk about her work and experience as a research fellow. 

Marijuana legalization poses many challenges — especially those related to drug chemistry and toxicology — for researchers, law enforcement, and policy makers. In the latest episode of Justice Today, NIJ Communications Assistant Josh Mondoro hosts a conversation with NIJ Scientist Frances Scott about marijuana toxicology, including comparing its effects to alcohol, measuring impairment, and maintaining public safety as more and more states legalize recreational marijuana. 

Marijuana poses many challenges for researchers, law enforcement, and policy makers, challenges that fall into two fields: drug chemistry and toxicology. NIJ scientist Dr. Frances Scott joins this episode to explain the complications in drug chemistry and how difficulties defining marijuana lead to backlogs in crime labs around the country. NIJ Communications Assistant Josh Mondoro hosts. 

The emerging drug crisis in the U.S. touches both criminal justice and public health, and experts from both fields came together at NIJ’s 2023 National Research Conference to discuss strategies and tools to fight this problem. Dr. Frances Scott, NIJ scientist and program manager, continues the conference discussion with two fellow panelists: Ciena Bayard, the Method Development and Validation Program Manager for D.C. Office of the Chief Medical Examiner, and Haley Greene, the Deputy Epidemiologist for the Central Region for the Virginia Department of Health. Read the transcript.

In April 2018, the Golden State Killer, Joseph DeAngelo was arrested. NIJ support helped lead to his arrest, and in the aftermath of the arrest, NIJ Social Science Analyst Eric Martin was among those tasked with finding other cases NIJ helped law enforcement solve. Eric joins the show to talk about some of those cases, and answer some broader questions about serial killers: What is a serial killer? Are they on the rise? How do we know how many serial killers are currently active?

The long-standing problem of estimating the age and sex of subadult skeletal remains has been significantly "solved" with the advances in understanding the growth and development patterns in the skeletons of young people. This is the second half of the conversation with Kyra Stull, an anthropologist and forensic researcher at University of Nevada, Reno, Danielle McLeod-Henning, a physical scientist at NIJ, host Jim Dawson. 

The long-standing problem of estimating the age and sex of subadult skeletal remains has been significantly "solved" with the advances in understanding the growth and development patterns in the skeletons of young people. Kyra Stull, an anthropologist and forensic researcher at University of Nevada, Reno, and Danielle McLeod-Henning, a physical scientist at NIJ, share more about this research with NIJ writer and host Jim Dawson.

The scientific basis of several aspects of forensic evidence was first called into question by the 2009 National Research Council report. That report had an immediate impact on law enforcement, crime labs, courtrooms, and the broader scientific community. 

NIJ Director Dr. Nancy La Vigne joins the show to interview Dr. Marie Garcia, Director of NIJ’s Criminal Justice Systems Division and a former NIJ graduate research fellow. They discuss the application process, Marie’s experience as a fellow while at Temple University, and advice for future applicants. 

Reading and Resources from NIJ:

NIJ scientist Tracey Johnson joins science writer Sarah Michaud in this episode. They discuss Rapid DNA technology, and Tracey explains the complexities of this technology – its pitfalls and its possibilities.

Reading and Resources from NIJ:

Stacy Lee Reynolds and Christine (Tina) Crossland continue their discussion of tribal crime, justice, and safety, including how Native American persons experience crime victimization at higher rates than non-Native people and the jurisdictional complexities in responding to tribal crime, justice, and safety. Read the transcript.

Listen to the first half of Stacy and Tina’s discussion.

Reading and Resources from NIJ

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