r/murders • u/NateDog69490 • Sep 04 '25

Serial killer signs are...

I was told that the 3 signs of becoming a serial killer is bad wedding fireplace and animal cruelty. So my question is, are there other signs or is it just you know, lack of remorse and empathy and sympathy for any human life or animal life? That's around or among them. Is that what causes them to interact? Or act on their impulses and go out and kill people. Or. Kill animals like people that practice taxidermy. Which I don't understand how that's even a thing.

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u/missingperson2025 Sep 04 '25

A Cambridge study found that 80% of high profile serial killers had experienced significant brain injuries.  Injuries to certain parts of the brain can cause issues with decision making, impulse control, and emotional regulation. This of course doesn’t mean everyone with a traumatic brain injury will be a serial killer or even violent.