On the hunt for a serial killer who are they?

Serial killers fall into different categories, not all killers are the same. Richard Decker, MSPSCJ, PhD is an expert on investigative processes and human behavior, he is a semiretired investigator, and criminalist, he is published and recognized internationally for his contributions in criminal justice and social behaviors.

music: Requiem of Angels (No Choir version)-8466 Jonathan Nicholas Adamich