Psychopedia: True Crime & Criminal Psychology cover art

Psychopedia: True Crime & Criminal Psychology

Psychopedia: True Crime & Criminal Psychology

By: Investigator Slater
Listen for free

Psychopedia is a captivating true crime podcast hosted by Investigator Slater, where she passionately takes you deep into the darkest recesses of the human psyche each week. A professional investigator by day, Slater uses her investigative expertise to uncover the chilling, hidden details behind each true crime case presented. Even if you think you’ve heard about a particular case before, prepare for a fresh, eye-opening perspective that dives deeper into the facts, psychology, criminology, and the dark truths you never knew. Every episode is presented with the utmost respect for the victims, while keeping you hooked with pop quizzes designed to engage and entertain (and give you a glimpse into Slater's own twisted mind). Prepare for a truly immersive experience—because this is true crime like you've never heard it before.

Instagram + TikTok: @psychopediapod @investigatorslater. A podcast in partnership with Audacy.

© All Rights Reserved. True Crime
Episodes
  • EP191: Killing for CLOUT: The Casanova Killer (Part 2)

    EP191: Killing for CLOUT: The Casanova Killer (Part 2)
    Jul 8 2026
    Trigger Warning: This episode discusses SA, child homicide, and graphic violence. Listener and viewer discretion advised.Serial killer Paul John Knowles was desperate to leave behind a legacy and to go out in a blaze of glory. Linked to the deaths of at least 18 people, the "Casanova Killer" recorded a "kill tape" confession detailing one of the deadliest multi-state killing sprees in American history. Guilty of assault, murder, and attempted necrophilia, Paul was driven by his desire to become famous for the heinous crimes he committed. In Part 2, we continue to explore his horrific crimes and examine the psychology and criminology behind one of America's most prolific serial killers.Join my Patreon family! You get AD FREE episodes, exclusive true crime content, Girl On Gore Season 2, behind-the-scenes pics/vids, private group chats, a place to request a case, and much more! https://bit.ly/3SDv7W8 JOIN ME EVERYWHERE!Instagram: https://bit.ly/4f8eAlH TikTok: https://bit.ly/4oXXIl9Patreon: https://bit.ly/3SDv7W8 Spotify: https://bit.ly/44FzT88 Apple: https://bit.ly/4uXQj6F Website: https://www.psychopediapod.com/==SPONSORS==AquaTru: Go to AquaTru.com now for 20% off (your purifier) using promo code PSYCHOPEDIA.NOCD: To learn more about starting OCD therapy with NOCD, go to NOCDand book a free call with their team.Quince: Make your summer wardrobe feel easier. Go to Quince for free shipping on your order and 365-day returns.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.
    Show More Show Less
    59 mins
  • EP190: "MORE BRUTAL" than Ted Bundy - Paul John Knowles, The Casanova Killer (Part 1)

    EP190: "MORE BRUTAL" than Ted Bundy - Paul John Knowles, The Casanova Killer (Part 1)
    Jul 1 2026

    Trigger Warning: This episode discusses SA, child homicide, and graphic violence. Listener and viewer discretion advised.


    Now on YouTube! Watch + subscribe: @investigatorslater


    Paul John Knowles is an American serial killer linked to the deaths of at least 18 people. He recorded a chilling "kill tape" confession detailing his murders and carried out one of the deadliest multi-state killing sprees in American history in just a matter of months. Known as the "Casanova Killer" because of his conventionally handsome appearance, Paul murdered men, women, and children, sexually assaulted many of his victims, and even attempted to commit necrophilia. In Part 1, we explore his troubled upbringing and the events that transformed him into one of America's most prolific serial killers.

    Join my Patreon family! You get AD FREE episodes, exclusive true crime content, Girl On Gore Season 2, behind-the-scenes pics/vids, private group chats, a place to request a case, and much more! https://bit.ly/3SDv7W8

    JOIN ME EVERYWHERE!

    Instagram: https://bit.ly/4f8eAlH

    TikTok: https://bit.ly/4oXXIl9

    Patreon: https://bit.ly/3SDv7W8

    Spotify: https://bit.ly/44FzT88

    Apple: https://bit.ly/4uXQj6F

    Website: https://www.psychopediapod.com/


    ==SPONSORS==

    AquaTru: Go to AquaTru.com now for 20% off (your purifier) using promo code PSYCHOPEDIA.

    NOCD: To learn more about starting OCD therapy with NOCD, go to NOCD

    and book a free call with their team.

    BetterHelp: Sign up and get 10% off at BetterHelp

    Quince: Make your summer wardrobe feel easier. Go to Quince for free shipping on your order and 365-day returns.


    To learn more about listener data and our privacy practices visit: https://www.audacyinc.com/privacy-policy

    Learn more about your ad choices. Visit https://podcastchoices.com/adchoices

    See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.
    Show More Show Less
    1 hr and 3 mins
  • EP189: Five Wives and a False Prophet: Nathan Chasing Horse and "The Circle" Cult

    EP189: Five Wives and a False Prophet: Nathan Chasing Horse and "The Circle" Cult
    Jun 24 2026

    Trigger Warning: This episode contains discussions of domestic abuse and child SA. Please listen with caution.


    Five wives. A revered spiritual leader. A celebrated actor whose role in Dances with Wolves made him famous around the world. For decades, Nathan Chasing Horse cultivated an image as a respected medicine man and cultural figure - but behind the scenes was a sprawling web of sexual abuse, manipulation, and control. Nathan Chasing Horse used his spiritual authority to convince followers that he possessed supernatural powers, that he could see the future, and that young girls were destined to become his wives. What emerged was a story that sounds less like a religious community and more like a cult: one built on fear, obedience, and the unchecked power of a man who was treated as untouchable — until survivors finally spoke out and brought his reign of abuse crashing down.


    FOLLOW/SUBSCRIBE to Psychopedia wherever you are listening!

    FOLLOW Investigator Slater on Instagram + TikTok: @investigatorslater

    Join our Patreon family! (⁠www.Patreon.com/PsychopediaPod⁠) On Patreon, you get AD FREE episodes, exclusive true crime content, behind-the-scenes pics/vids, private group chats, and much more!

    To learn more about listener data and our privacy practices visit: https://www.audacyinc.com/privacy-policy

    Learn more about your ad choices. Visit https://podcastchoices.com/adchoices

    See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.
    Show More Show Less
    1 hr and 10 mins
adbl_web_anon_alc_button_suppression_t1
All stars
Most relevant
Slater is the best at getting all the information about the most interesting cases! Love all the episodes and binged them! 10/10! Highly recommend!!

My favourite podcast!

Something went wrong. Please try again in a few minutes.
I want to be more Mary. Just Mary is an absolute boss. I don't understand how she did what she did but I am here for it all day long!.

Go Mary.

Mary is the fucking boss

Something went wrong. Please try again in a few minutes.
I saw this title and the two hosts and I admit that I thought oh this is a 'Joe Rogan does true crime' right wing podcast. I was ABSOLUTELY proved wrong almost instantly as the intelligently researched crime stories, expertly delivered by investigator Slater and interjected with thoughtful, considered and empathetic remarks from the admittedly 'jacked' Tank Sinatra. That's not to say there isn't humour and 'in jokes' that when you know, you know. Tanks love of hip hop and obviously meme culture comes through in the episodes. Brooke Slater (an actual investigator in her day job working with human trafficking among other things) has a real knack for researching all the key elements of a case and humanising victims as well as her 'pop quizzes' that she posits to Tank and the listener which is a novel feature i personally love. overall an excellent True Crime podcast that only gets better as it goes on and I think will shine through as one of the top of it's genre. Crimedy Chaos Completed supremely.

It is a doozy, great true crime comedy cohorts.

Something went wrong. Please try again in a few minutes.