This comes from World Homicide
Various murder cases, crimes, methods and murderers
Kill with a borrowed knife, disguise the scene, etc.
For example...
Pedophiles: Violate little girls, attack their own nieces, they use any means: drugging, etc., Overdosing until death
Dismemberment: only the trunk, head, hands, or bones are left, some of which are still missing.
Human skin is removed from the human body to make a wallet or even a leather bag
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Purpose: To become a good author