Most criminals classified on the highest levels of the scale usually commit sexual related crimes before killing the victim.

The show portrays very violent crimes including brutal murders, mutilation and cannibalism. The life of famous psychopaths like Manson, Gacy, Gein and Dahmer are also discussed with great detail and there's much violent behavior described.

Infrequent swearing of recordings and criminals interviewed in the show.

Some of the criminals were under the influence of alcohol during their crimes. Examples are the followers of Manson, Eric Beishline and Archie McCafferty.