Its been more than 15 years since Teresa Halbach disappeared on a photography assignment for Auto Trader Magazine, but some still question the convictions of the two men found responsible for her murder.
Two intruders stormed into the Douglass house in October 1979, robbing the family and chillingly shooting all four as they lay face down on their living room floor.
Dateline reporter Dennis Murphy described the mastermind of the gruesome plot to kill young parents Josh Niles and Amber Washburn as "perhaps the most villainous killer" he's ever come across.
Lissa Yellow Bird spent years tracking down missing Indigenous women, until one day her own niece Carla Yellow Bird disappeared, sparking a very personal mission to bring her back home.
Amy Mihaljevic had agreed to meet a man she believed worked with her mom to buy her a special present when she disappeared in October of 1989. Detectives are hoping someone has the key to solving the mysterious case.
Kathleen Peterson was found at the bottom of the staircase in her lavish North Carolina home in 2001, but the mystery around her death continues to endure.