Unsolved Mysteries : Bizarre Murders : 15 Episode Box Set :Colorado Cop Killers , Boston Strangler ,Texas Most Wanted , Trailer Terror , Bad Chief , Marie Hilley , Journalist's Murder , Scared to Death , Murdered Heiress , Unicorn's Secret , Women's Prison Killing , Skull Duggery , Backyard Bones , World Leaders , Burning Bed : Over 4 Hours