Documentary filmmaker and Mindhunter co-author Mark Olshaker opens with one of the most chilling sequences in American criminal history: Ed Kemper - a 6-foot-8 serial predator who targeted hitchhiking co-eds to punish a mother who told him he'd never be loved - then drove to Nevada, called the Santa Cruz police from a payphone, and said, "It's me. I've done it. Come and get me."

In this Part 1 conversation with hosts Craig Floyd, Dennis Collins, and Bill Erfurth of Heroes Behind Behind the Badge, Olshaker traces how two FBI agents armed with nothing but their badges started interviewing the worst serial predators in American history - and built a system that changed how killers are caught. He reveals what goes on inside the mind of a serial killer before, during, and after a crime — and how those prison interviews became the Emmy-nominated documentary Mind of a Serial Killer and the book that named the movement: Mindhunter.

The conversation goes deep on Ed Kemper's displacement psychology, Sam Little's 90 confessed murders, and why FBI legend John Douglas once described Kemper as "rather likable." Olshaker also unpacks the crucial difference between MO and signature, and why understanding it is the key to profiling any serial predator.

Part 1 closes at the doorstep of Dennis Rader's story. In Part 2, Olshaker goes deeper into the serial killer who hid behind a church pulpit, whether these predators can be identified before they strike, and the kidnapping case he says was never going to end well.

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