Forensic sciences

Nanoparticles and other subvisible particles potentially present in nearly all trace evidence are often overlooked in forensic investigations. NIJ-supported researchers have characterized several types of particles and developed detection methods.

Analyzing illicit drugs such as methamphetamine is difficult because the drugs break down when heated in gas chromatographs. Investigators determined that a new method can avoid the heat issue and improve results.

An expert workshop on a hidden hub of crime on the internet identified priority investigative needs, including demystifying the “dark web”, training investigators to identify dark web evidence and activity, and building cross-jurisdictional partnerships.