Introduction

Organism, starting from less evolved to highly developed like human being, live in a specific environment and as such, are modified accordingly with the external environmental stimuli. The behavior of an organism is dependent on the developmental stage of nervous system of the organism. More developed the nervous system, more phenotypic plasticity the organism will show and hence more complex the behavior of the organism will be. Despite being at the top of behavioral evolution, human beings like other organisms, have certain basic characteristics which are expressed under ambient external stimuli. These characters are not under the direct control of the individual, rather controlled by Autonomous Nervous System. For example, a person experiences extreme urination during stress, the heart rate escalates upon reading a sad news, etc. Similarly, human beings are evolved through ages with certain conserved basic characters which define the personality and moral character of the person. A person is born with these characters and ungrudgingly intends to cherish and follow these set of rules. Satisfaction, fulfillment of one’s wishes and desires, is one of such characters that is the end result, the individual is fighting for. A person climbs a peak for some inner satisfaction, other person works the whole day with an expectation of receiving some gain at the end of the day, which brings him satisfaction. This tendency is not limited to humans only but extends to other animals also. A dog comes up with strong resentment upon seeing an infiltrator claiming his territory in a specific area and after giving infiltrator, a successful bid, feels highly satisfied. Therefore, it can be claimed that every individual intends to progress towards attaining greater and greater satisfaction levels. Whenever some hurdle comes in the way of the progress of attainment, it is attempted to be removed whether legally or illegally. These hurdles may be in the form of deprivation of wealth, property, gaining supremacy, avoiding competition, avoiding disturbances in personnel life, etc. Attaining satisfaction through these material factors may force the person to opt for legal as well as illegal ways/methods. Any factor which comes in between an individual and his objective of satisfaction can be met with serious consequences. Therefore, an individual opting for illegal ways of attaining satisfaction is said to have committed a crime. This is a deviation from the normal behavior of an individual and is termed as Psychological disorder. The concept that a psychological disorder will intern produce various signs, are actually the basis of various techniques of crime detection.