U.S. flag

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

Principles of Forensic DNA for Officers of the Court

How is a Suspect's DNA Obtained?

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

Photo of a police officer arresting a man
National Institute of Justice (NIJ) (see reuse policy).
  • Secured from an arrestee or a convicted person under a law requiring such persons to provide DNA samples.
  • Seized during a suspect's arrest or detention.
  • By court order, such as a search warrant or grand jury subpoena. 1
  • By consent or from a sample left in a public place or crime scene.

Back Forward