This type is considered insane or psychotic. They often hear voices in their head telling them to commit the crime. They may also see visions.
This type displays no psychosis to the outside world, while on the inside the killer has a need to rid the outside world of what he considers immoral or unworthy. This type of killer will select a certain group of individuals to kill (prostitutes, young women, gay men, etc.)
This type is in it for the fun. This killer gets a high from killing. He is very sadistic and kills for excitement.
This type is a sexual killer, and kills for the pure turn-on. The amount of pleasure the killer derives depends on how much they torture their victim. The more heinous the torture, the more aroused they become. This type is in touch with reality.
