the way they were treated as children. Many examples to support this theory can be found throughout history. One example is the infamous Charles Manson. Charles Manson's home life was anything but normal; he was, in fact, the son of a "teenage, bisexual, alcoholic prostitute, and was once traded for a pitcher of beer" ("Sanders ..."). Pedro Alonso Lopez, believed to be the key player in over 300 murders, was "kicked out of his house when only 8 years old" ("Serial..."). These cases, as well as many others, seem to indicate a correlation between abuse as a child and violent tenancies as an adult. A renowned psychologist, Shervert Frazier, has concluded: "many killers have been subjected to brutalizing treatment that generated overwhelming hostility and ultimately murderous emotions in them. Many had bean beaten repeatedly or sexually abused as children" (Methvin). Another common link has been found that proves that people who act violently as children will most likely grow up to do the same. For instance, Jeffrey Dahmer as a child "liked to torture and kill animals. As an adult he did the same to humans" ("Jeffery Dahmer").
             Although criminal insanity is often thought to be a psychological disorder much evidence has appeared over the years to spark a theory that criminal insanity is not solely psychological, but also a physical disorder. Dr. Adrian Raine, of the University of South California, is one believer of this theory. In his studies and tests he has found "that in psychopathic murderers there was less activity in the prefrontal cortex of the brain" ("Natural Born..."). Could lack of activity in an area of the brain be the cause of criminal insanity? It is possible, but most likely it is not the only cause. Dr. Raine also says that he believes that violent and psychopathic behavior is caused by environmental factors in additional to biological ones ("Natural Born..."). This leads us to again believe...