John Douglas on chasing serial killers

The real-life 'Mindhunter' reveals the most evil criminals he's interviewed | Your Morning

Know Their Motive | John Douglas Teaches How to Think Like an FBI Profiler | MasterClass

John Douglas on the mind of a criminal

The Different Types Of Serial Killer | The FBI Files

Mind Hunter /// John Douglas /// Part 1

Inside the Mind of BTK by John Douglas - Audiobook - Part 1