2. Richard Trenton Chase
While every person in this list is despicable, to say the least, we are now venturing into even darker territory. Chase would shoot his victims dead, which is not an approach serial killers generally use, as they prefer stabbing and such approaches, believing them to be more intimate. He was called ‘The Vampire of Sacremento” due to his habit of drinking the blood of his victims while also consuming their remains. He was finally apprehended, and after being sentenced to death he committed suicide in his cell by overdosing on antidepressants.