When the court learned that someone else performed the tests he claimed to have done himself, Larry Stewart was tried for perjury.

FORBES: Forensic evidence doesn't always tell the truth.

Larry Stewart said his tests showed the potentially exonerating notation was made with different ink, thereby suggesting that it might have been added later.

FORBES: Forensic evidence doesn't always tell the truth.

In the Martha Stewart trial, government forensic scientist Larry F.

FORBES: Forensic evidence doesn't always tell the truth.