S3, E3: She’s known as the “forgotten victim” of the Texas Killing Fields. On November 3, 1989, lawn crews found a 33-year-old newlywed dead under a bridge in League City, Texas. Police determined she had been strangled and sexually assaulted. Her name was Cheryl Martin, and she had a family who never knew what happened to her for 30 years. Now, detectives believe they may have the unlikely murder weapon used to strangle Cheryl. Could it contain the killer’s DNA?