Killer Unknown

What happens when some of the finest investigators in the country come out of retirement to put their collective talents and years of experience towards the most notorious cold case murders in the area they call home? Investigation Discovery’s (ID) all-new series, Killer Unknown follows an active investigation in real time, as the Tulsa County Sheriff’s Office (TCSO) Cold Case Task Force cracks open the 31 unsolved cases of Tulsa County, starting with two of its most terrifying: the 1973 murder of 38-year-old Veda Woodson, and the 1998 murder of 16-year-old Dena Ann Dean. Both unsolved cases continue to haunt the Tulsa community, and now the TCSO Cold Case Task Force is determined to find justice for the victims. (Discovery Networks)