Examining one of the most high-profile criminal cases in recent history, part one of the three-part documentary series Revealed - Death Cap Murders will premiere September 14, only on Stan. #RevealedOnStan #StanOriginals | Stan.

As decades passed, the mystery of who killed a Michigan mom only grew. Nearly 25 years later, investigators were able to use advancements in DNA technology to re-examine evidence initially collected at the crime scene. Watch David Muir's 20/20 'The Code Breakers' encore - Friday (August 22nd) at 9/8c on ABC. Stream on Hulu and Disney . | ABC 20/20