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Trace evidence

Backlogs and Their Impact on the Criminal Justice System

June 2010

Evidence backlogs have been known to be an issue in crime laboratories. A recent study published by NIJ has shown that backlogs of untested evidence are also an issue in law enforcement evidence storage. This panel will discuss the issues and present preliminary findings from a study of the Los Angeles Police Department's and Los Angeles County Sheriff's Department's experience with clearing out a large backlog of unanalyzed rape kits.

Trace Evidence

Trace Evidence

Trace evidence refers to materials transferred between people, objects, or the environment during a crime. This evidence can help investigators develop leads, indicating (or excluding) potential suspects or locations for further scrutiny. Trace evidence encompasses a wide range of natural and manufactured materials.

Traditional trace evidence includes:

  • Glass
  • Fibers
  • Tape
  • Paints, dyes, and pigments
  • Gunshot residue
  • Ignitable liquids
  • Explosives
  • Geological (minerals and soils)
  • Pollen...

Making Sense of the DNA Backlog - NIJ Conference Panel

June 2009

Panelists will present findings from two NIJ studies that examined the DNA backlog in law enforcement agencies and crime labs. Panelists will discuss research findings related to new and potential time- and cost-saving approaches.