20/20 Season 47 Episode 11 Highway Hunter

In the spring and summer of 1997, four young women vanish in quick succession. Two of them go missing just off Texas Interstate 45, and the other two disappear just a few hours north. Could a serial killer be roaming the highways between Texas and Oklahoma? ABC News correspondent John Quiñones takes viewers inside the decades-long cold case investigation and four families' quest for answers. The report features exclusive footage of a hypnosis session with a fifth survivor that helped lead police to the killer and behind-the-scenes details into the killer's confession. The two-hour episode includes powerful new interviews with the family members of the victims, including Gay Smither, Laura Smither's mother; Jan Bynum, Kelli Cox's mother; Alexis Bynum, Kelli Cox's daughter; Kathy Dobry, Tiffany Johnston's mother; and C.H. and Suzy Cain, Jessica Cain's parents. It also features interviews with members of law enforcement who helped solve the cases after two decades.