Lawrence Bittaker and Roy Norris are two of the worst serial killers you’re ever going to hear about. Both Bittaker and Norris were in and out of prison since their teenage years, but never did anything that would keep them locked away for a long, long time. That is until they began murdering young girls via means of torture, rape and brutality.  Dubbed the Toolbox Killers because of the instruments used in their murders, this episode and a few more are going to disturb you to the core.