John Olszewski

John Olszewski was born and raised in the historic city of Salem, MA. From a young age he became fascinated with true crime. This led to a lifelong mission to learn everything he could about serial killers and other infamous murderers. Along the way, John received degrees in Criminal Justice, Behavioral Science, and Counseling Psychology. He worked in academic institutions, jails, prisons, and treatment centers, as well as appearing on the lecture circuit.

Mind of a Killer (Winter Term 2026)

Participant Testimonials:

To come