The Mind Detective
Joni E. Johnston, Psy.D.A forensic psychologist, private investigator and crime writer explores the psychology of the criminal mind.
| Platform |  | Pricing | Only free issues | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 141 | Subscribers | Read | joniejohnstonpsyd.substack.com |
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Latest Issues
Recent posts by this newsletter. Browse the email archive.
The Psychopathic Psychiatrist and the Murder of his Wife
Sometime in 1999, Colin Bouwer stood in front of a room full of medical students at the University of Otago in Dunedin, New Zealand, and told them that injecting insulin between the toes was the perfect way to commit a murder.
Intimate Partner Poisoners
On Monday, February 23, 2026, Kouri Richins will sit in a Summit County, Utah courtroom and face a jury for the alleged murder of her husband, Eric. The prosecution’s theory: she poisoned him with fentanyl, then collected on life insurance ...
Suicide or Murder?
Days before she died, Brenda Leon emailed a friend to confirm she was coming to a reunion.
How Not to Raise a "Monster"
Tommy Lynn Sells was seven years old when his mother let a neighborhood man take him on day trips, shower him with gifts, and eventually sleep at his house. The man was a pedophile who molested Tommy for years. When Tommy’s mother found out...
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Authors
The writers behind this newsletter.
forensic psychologist, private investigator, true crime writer, host of Unmasking a Murderer YouTube channel, Psychology Today blogger, author of Serial Killers: 101 Questions True Crime Fans Ask
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