‘The Murder Tapes’ Preview Tuesday On Investigation Discovery

· Don’t Look Back premieres Tuesday, July 28 at 10/9c Karen Simek is a talented food service worker at a food center in Milwaukee. When her body is found with a gunshot outside her office, it leaves her family in shock and sparks a year-long investigation ultimately leading detectives to Karen’s killer.

Twisted Upside Down premieres Tuesday, August 4 at 10/9c When Kalamazoo, Mich. police receive an anonymous call claiming William Gray was attacked, thrown into the trunk of a vehicle and driven from the scene, a citywide manhunt begins. Day-after-day, officers hear versions of the same story and there are no new developments in their missing persons case. Detectives interview dozens of people who attended the party where William was last seen alive, however investigators face a wall of silence. Just as it seems they may never find William, dead or alive, an unexpected source surfaces, providing police with what they need to track down the body – and uncover the truth.