Forensic Sciences: Types of Evidence

Best Practices for Biological Evidence

The Biological Evidence Preservation Handbook: Best Practices for Evidence Handlers (pdf, 73 pages) offers guidance for individuals involved in the collection, examination, tracking, packaging, storing and disposition of biological evidence.

Evidence refers to information or objects that may be admitted into court for judges and juries to consider when hearing a case. Evidence can come from varied sources — from genetic material or trace chemicals ​to dental history or fingerprints. Evidence can serve many roles in an investigation, such as to trace an illicit substance, identify remains or reconstruct a crime.

NIJ funds research and development to improve how law enforcement gathers and uses evidence. It supports the enhancement and creation of tools and techniques to identify, collect, analyze, interpret and preserve evidence.

Date Modified: March 29, 2013