Why do serial killers murder?
There are multiple reasons which can motivate a serial murderer. Just to name a few: financial gain, witness elimination, lust, thrill.
Dr. Aamodt from Radford University/FGCU analyzed thousands of serial killers within U.S and Internationally, creating one of the most documented serial killer databases.
Bellow you can see the number of serial killer split by their motives for killing, both U.S. and International.
serial killer motives
For more serial killer statistics visit this page: Serial Killer Statistics