Serial murder investigators uncover new details about a crime that took decades to solve and one that drove investigators to go undercover to catch a criminal more than a hundred years ago.
After arresting a serial killer famous for tying up his victims and another who randomly targets pedestrians on the streets of Arizona, a group of investigators reveals the details of some of the most complex and surprising cases.
Serial murder investigators continue to uncover some of the most controversial incidents of how they pinned down a killer who chose his victims based on their zodiac signs and a criminal who targeted his followers.