McCartney 3, 2, 1

Who killed Angela Kelley? The 17-year-old high school senior was found dead on the side of a road in Pasadena, Texas, in 1979. She had been bound with electrical wire and strangled to death. For more than four decades, leads in the case fizzled, and her family and friends have had to live with the pain of not knowing who killed her. Now, old evidence is being retested and for the first time, police are sharing her entire case file - hoping Angela's killer might finally be caught.

On May 13, 1994, Trellis Sykes left her grandmother’s house in Houston’s Sunnyside neighborhood to walk to school. But the 16-year-old never made it there. Instead, while taking a shortcut through a field of tall weeds, she was hunted down, sexually assaulted and murdered. Someone’s DNA was found on her - but whose? Police say it’s time to try testing that DNA again. Almost three decades later, they’re sharing new details and crime scene photos from the case. Plus, the prison interview with a serial rapist convicted in other attacks in Sunnyside.

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?