Watch
  • Investigation Discovery

Signs of a Psychopath

  • 2020 – 2025
  • Returning Series
  • Documentary · Crime
  • ~23m / ep
  • 11 seasons
  • 7.8/10

This harrowing half-hour archive series revisits some of the most brutal killers in modern history, reviewing news footage and the words of the killers themselves to see which terrifying traits each killer exhibited. What are the signs...of evil?

Latest: Season 10 · 2025

View all seasons

Signs of a Psychopath Season 10 dives into chilling true crime cases, highlighting individuals exhibiting traits like lack of empathy, manipulation, and violence, with episodes featuring revenge-fueled killers, a suburban dad hiding psychopathy, a seemingly gentle killer driven by demons, and a focus on "sexual psychopaths" driven by extreme urges, all while experts dissect the psychopathic mind behind these horrific acts.

  1. E1. I'm Already Seeing Red

    Aug 3, 2025 · 20m

    Police engage in a massive manhunt to find a killer on a murder spree of revenge, taking the lives of his girlfriend, cousin, and a man he considers a father figure. Once captured, he proclaims that he simply wants to be "heard."

  2. E2. Just Don't Want to Go to Jail

    Aug 3, 2025 · 21m

    Authorities grow concerned when a 25-year-old woman reports her 50-year-old father and 6-year-old daughter missing. Police discover their dead bodies and uncover the shocking truth she is a psychotic killer.

  3. E3. That Anger Would Rise Again

    Aug 10, 2025

    For over three decades, Albuquerque police struggle to solve three violent cold cases. After years of searching, the cases break wide open when officers pick up a man on a probation violation. and he soon reveals himself to be a homicidal psychopath.

  4. E4. He Went Boom

    Aug 10, 2025

    Pensacola Police are called to the Corner Store when a killer guns down a young man in a brazen public execution in the parking lot. Police track down their suspect and find a cold-blooded psychopath without remorse.

  5. E5. It's Despicable and Gruesome

    Aug 24, 2025

    When a young mother goes missing, her husband joins the search while police discover her dismembered body in a stack of bins.

  6. E6. I Just Smiled and Laughed

    Aug 24, 2025

    A vehicle plows down a 75-year-old military veteran on a country road in an apparent hit-and-run. When a young man confesses to the crime, detectives quickly learn they've encountered a psychopath with an intense desire to thrill kill.

+9 more episodes — open all seasons to browse every episode.