What sets a serial killer apart from a murderer?
I don’t really know what sparked this question but does a serial killer have to have a signature? Do they have to kill a specific amount of people? And what about a mass murderer, how come they aren’t serial killers… or are they? And last question, does anyone keep track of serial killers/mass murderers?
This question is in the General Section. Responses must be helpful and on-topic.