20 Serial Killer Theories That Turned Out to be TRUE - YouTube
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What actually turns a person into a serial killer? This video tests the most chilling psychological and criminological theories against real-world cases — and some hold up disturbingly well.
MacDonald TriadPsychopathy TheoryBiosocial Theory of CrimeAttachment Theory
Theory Briefing
- Investigators once theorized that childhood trauma and abuse were common threads among serial killers — and verified case files repeatedly confirm it.
- The 'MacDonald Triad' theory linking bed-wetting, arson, and animal cruelty to future violence found real support in documented killer histories.
- Biological theories about brain abnormalities and reduced empathy in serial killers gained credibility as forensic neuroscience examined offender case studies.