This 15-module interactive, computer-based training program discusses DNA evidence from the crime scene to the laboratory and from the courtroom to postconviction testing. Topics addressed include the biology of DNA and key issues related to how DNA is used to identify suspects; the operations of a forensic laboratory, including how to understand a DNA laboratory report; statistics and population genetics; DNA analysis, including mitochondrial and short-tandem repeat (STR) analysis; the collection of DNA from evidence and suspects; victims issues, such as privacy considerations and testing procedure; pretrial evidentiary issues; trial presentation; and emerging trends in DNA analysis. One module discusses ways to help jurors understand DNA evidence. It features a video that shows an expert witness presenting her background and qualifications to a jury, and guidance is provided for composing questions for a forensic DNA expert. Another module discusses the framework within which States can conduct postconviction DNA testing. The training uses a multimedia approach that includes text, images, animations, audio, and video. Although it is designed primarily for prosecutors, defense attorneys, and judges, it is also appropriate for victim advocates, investigators, law students, and other criminal justice professionals interested in this area.