I'm almost obsessed with the criminal mind , most of my spare time is used researching it and trying to get a better understanding .I'm especially fond of the mind of serial killers or humans who hunt other humans for thrills . Even those who hunt killers after all I believe...
Wikipedia defines a serial killer as the following:
A person who murders three or more people over a period of more than 30 days. With a cooling off period between each murder.
Motive for killing is largely based on psychological gratificatio.