A serial killer is often chronically aggressive and they seem to have an over-controlled hostility towards others. Often they have been hurt and are resentful and traumatized. They become obsessive, paranoid and then insane. At this point they have lost control and can no longer control their needs. It is disturbing to note that serial killers are actually very rational and calculating. When it comes to serial killers many were physically or emotionally abused by parents, as children, fledgling serial killers often set fires, torture animals, and wet their beds. Surprisingly many have either attempted to become police, but were rejected, worked as security guards, or served in the military. In this book we will look at many aspects of the serial killer; for instance what qualifies as a serial killer? How do they choose their victims? Who are some of the most famous serial killers? And, we will look more closely at the unsolved murders by serial killers.