To some, death comes naturally; To others, it is taken away from them through the hands of another. Dennis Nilsen, for example, took the lives of 15 men. Sure this man is considered a serial killer, a mentally insane man who had strangled his victims, but what is really going in his head? New Science on the brains of Serial Killers had enabled forensic scientists and detectives to look inside the brain of a killer to determine how he or she thinks, and acts. The Environment and behavior of a serial killer play a key role in determining the activity in their brain. Lastly, their brain activity can give detectives an accurate picture of how they think which can help determine their motives for the killing or their next potential victim. With