John Douglas on chasing serial killers

FBI profiler John Douglas talks the ZODIAC KILLER

Interview with John Douglas, Author of "The Killer Across the Table"

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

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

The Different Types Of Serial Killer | The FBI Files

John Douglas on the mind of a criminal