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UNMARKED: A True Crime Podcast
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51: How Many Serial Killers Are Operating Right Now? | Case Notes

23 min•6 september 2026

Om avsnittet

How many serial killers are operating right now—and how many murders are we failing to connect?

This week on Case Notes, I’m joined by Dr. Michael Arntfield of the Murder Accountability Project to talk about the enormous amount of homicide data hiding in plain sight—and what it can tell us about serial murder in America.

We get into why homicides are underreported and misclassified, how the Murder Accountability Project uses data to identify suspicious clusters of killings, and what the numbers suggest about the serial killers who may still be operating today.

We also explore something I find particularly fascinating: the relationship between serial killers and the culture surrounding them. Drawing from his new book, Dr. Arntfield explains how killers consume true crime, movies, books, and stories about other murderers—and how that media can become part of the way they understand themselves and their crimes.

Show Notes:

Murder Accountability Project ⬇️
https://www.murderdata.org

Please Bring Me Home ⬇️
https://pleasebringmehome.com

Dr. Michael Arntfield ⬇️
https://michaelarntfield.com

Cop TV: The Extraordinary Untold Story of Television Police Shows ⬇️
https://www.amazon.in/Cop-TV-Extraordinary-Stories-Television-ebook/dp/B0H99WGYFH

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