So horrifying is the mind of a single individual who is addicted to the torture and domination of another creature. The word creature is used advisedly because often these people "practice" on animals. Animal torture in childhood is one of the markers of a serial killer.

There are also sub-categories of Serial Murder and I hope you will try to identify the specific type of serial murder is examples in these case studies. For instance, representing some of the different categories, John Wayne Gacy was an example of a pedophile,  Jeffrey Dahmer was an example of a cannibal. David Berkowitz is another interesting case. I want us to decide if he was a Satanist, part of a cult of killers, or if he was a paranoid schizophrenic. These are the predominant schools of thought on him. We will solicit the opinions of experts also to get their analysis also.