As a motive for murder, thrill, in my opinion, is probably the most frightening. As sick and twisted as it is to kill a person for sexual gratification, as lust killers do, at least we can understand their motivations (if “understand” is the right word). There are those who kill for monetary gain, and those who kill out of jealousy and/or rage. While these murders are horrifying, they do not leave us mystified as to the killer’s reasoning behind their terrible deed. Killing for the thrill of it is a different story.