Aside from animal torture, a paper published by John Macdonald encouraged parents to watch out for bed-wetting past the age of 12, and pyromania, or the love of setting things on fire. Those three indicators-cruelty to animals, pyromania, and late bed-wetting-became known as the Macdonald Triad. Later research has found that bed-wetting is not statistically linked to the likelihood of becoming a serial killer.
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50 Facts about Serial Killers and Psychopaths
RandomJust a list I took from the internet cuz I figured maybe a lot of people don't use the internet very often so yeah. ( Credits : the internet )
