Some killers are collectors who obtain perverse gratification by habitually stealing mementos from murder scenes, from jewelry to shoes, keys to even body parts. These clues are left to taunt law enforcement and investigators while simultaneously building up their notoriety. Whether it’s text scrawled onto the victim’s body, a cryptic note or a way of positioning the deceased, what is left behind is a trademark clue that ultimately aids the investigation in stopping these murders and bringing the killer to justice.