U.S. flag

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

What Every Law Enforcement Officer Should Know About DNA Evidence

Investigators and Evidence Technicians

Absorbent Surface Procedures

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

Procedures for collecting wet stains on absorbent surfaces are:

  • Submit the entire item if possible
  • Use one or more sterile cotton swabs to soak up the stain
  • If the stain is small, concentrate the stain on the tip of the swab (the swab stick may be wooden or plastic)
  • Document that the stain was found wet and identify from where the stain was collected

Back Forward