Genetic or Physiological Evidence

Additional external, as well as internal factors, also contribute to triggering the genetically illegal traits. Genetically illegal traits are those that cause one to be impulsive and act in an abnormal way from what is considered ordinary. A good example of a Biological trait that transfers by means of Genes is addiction. Once the gene is exposed to a triggering factor like living in a drug-prone area, it becomes active. The effect of the situation is deviant behavior and engaging in criminal conduct. The abnormal behavior is what brings about bad decision making which is in the form of violence and lack of empathy (Silva, 2004). If there are impairments in the preferential structures of the brain, then chances are there are impairments in the functional structures since the two are parallel to each other.

Glucose metabolism located in the prefrontal cortex is lower in murderers than it is in other persons with no criminal behavior (Kaiser, 2010). This means that the prefrontal cortex whose role is to act as an ‘emergency brake’ when emotions become overwhelming fails to do so in some people thus leading to uncontrollable behavior. The conclusion, therefore, is that genes make up to 90% of the dissimilarity in the amount of gray matter found in the human brain. As can be, the classical theory did not pay attention to the external and internal factors that cause criminals and psychopaths to behave in a certain way. Rather, it concentrated on the will and decision-making capabilities of human beings to separate right from wrong. The theory ignored the vital information that some behaviors are uncontrollable because of brain dysfunction.

On part, positivists theory rely on science tests to prove theories as opposed to using world observations, looking for the main causes of crime be it psychological, social or biological and finally refusal to use punishment when a crime has been committed and instead using treatment (Curran, 2001). Treatment in this instance is categorized as a medical rehabilitation. John Hinckley Insanity Case John Hinckley Jr. , who attempted to assassinate the then president of America Ronald Reagan and made a plea of insanity as his defense was sentenced to a psychiatric hospital. Before the attempted assassination, John Hinckley had become obsessed with a movie called Taxi Driver. In the movie, the protagonist plots to assassinate a presidential candidate. It is believed that he watched the movie more than fifteen times and decided to buy a gun at which time he was struggling psychologically.

Conclusion It should be noted that not all persons with antisocial personality disorder end up becoming criminals the same way, not every criminal offender meets the criteria for the antisocial disorder. There has to be a correlation between the two. Just as many studies have shown that one's surrounding and social skills contribute to a person's behavior, the fact still remains that biology and more specifically genes have a major impact on one’s behavior. Nonetheless, the combination of social environmental and biological aspects molds us into becoming persons with outstanding characters. Poverty, bad communities and social inequalities have been accused as key reasons in the causation of crime. M. , Theories of crime. (2nd edition. Needham Heights, MA: Allyn & Bacon. Elsevier.