U.S. flag

An official website of the United States government, Department of Justice.

Principles of Forensic DNA for Officers of the Court

Initial Consideration in Laboratory Protocol

Home  |  Glossary  |  Resources  |  Help  |  Contact Us  |  Course Map



Photo of a woman organizing evidence in the back of a van
National Institute of Justice (NIJ) (see reuse policy).

Extended exposure to heat or humidity causes degradation of biological evidence. To reduce this threat, the packaged items from the crime scene should be moved to a suitable storage facility as soon as possible.

Liquid samples should be transported in refrigerated or insulated containers.

Evidence should be stored in a temperature-controlled environment. Cool environments are preferred, although research has shown room temperature is suitable for storing dried stains, as long as the humidity is controlled.

Back Forward