U.S. flag

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

Principles of Forensic DNA for Officers of the Court

Previous Test Results

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

Photo of a scientist examining a test tube filled with liquid
National Institute of Justice (NIJ) (see reuse policy).

Issues to be considered when DNA testing was previously performed include:

  • What items of evidence existed at the time of the trial?
  • What type of analysis or tests were performed on the evidence?
  • What are the limitations of the tests that were performed?
  • Were the results presented at trial and, if not, why?

Back Forward