Killer Unknown (Documentary, English)
Genres: Crime
Status: Ended
Premiered: 2018-11-24
Ended: 2018-12-22
Network: Investigation Discovery
Country: US
Airs on: Saturday
Air time: 22:00
Runtime: 60 minutes
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 cases in Tulsa?