ers, seem to indicate a
             correlation between abuse as a child and violent tenancies as an adult. A renowned
             psychologist, Shervert Frazier, has concluded that many "killers have been subjected to
             brutalizing treatment that generated overwhelming hostile and ultimately murderous
             emotions in them. Many had bean beaten repeatedly or sexually abused as children"
             (Methvin 35). 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
             Although criminal insanity is often thought to be a purely psychological disorder
             much proof has appeared over the years to have sparked a theory that criminal insanity is
             not in fact psychological, but instead 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..." 10 ). Could this lack of activity in an area of the brain
             that is known to control certain emotions in people be the cause of criminal insanity? It
             is possible, but that is most likely not the only cause. Dr. Raine says that he believes that
             violent and psychopathic behavior is caused by environmental factors in additional to
             biological ones ("Natural Born..." 10 ). Many other psychiatrists and doctors feel the
             same way as Dr. Raine does. One psychiatrist, Dr. George B. Palermo uses CAT scans to
             "electronically scan the brain" ("Doctor is Allowed..." 11) of criminals to determine if
             they where criminally insane at the time of the murders they committed. Dr. Palermo
             also suggested the use of chromosome analysis for the same purpose. "Some specialists
             say chromosomes, which carry hereditary characteristics, are simila...