Criminal behavior refers to any action or behavior that breaks the law, where criminality refers to the particular act that exemplifies such behavior. The central and parasympathetic nervous systems have oddities that contribute to antisocial behavior. These anomalies combine with the environment, nurture, and a range of other factors to increase the chance of antisocial behavior only few studies have proven how these factors interact, but more research is still required in this area. There have been investigations on family, personality, location, socioeconomic level, peers, and education. Criminal behavior can be classified into various types using sociological factors such the offender's criminal background, group support for unlawful activity, the relationship between criminal and legal activity, and society's response. Criminal behavior requires both an offender and a victim to exist. The offender has always received the majority of public and court attention, despite the obvious necessity of this relationship. The care and protection of crime victims, either generally or in the context of particular criminal victimization, such as domestic violence or sexual assault, has long been the domain of special interest organisations. In academic research, while the historical emphasis has focused on understanding the circumstances, motivations, and behavioral components that lead to the execution of a criminal act, this focus on offender attributes has expanded. However, a more impartial analysis of the two aspects of the illicit activity is becoming more and more valuable. Several models have been put out to explain the traits of both criminals and sufferers, or how these traits influence the probability of committing a crime and/or suffering its effects. The "five model of victim characteristic," which is the empirically proven culmination of multiple prior victim typologies, is the most recent iteration of the typological models. In the Western world, criminal behavior by people with mental illnesses, particularly violence, has raised considerable public concerns. The public has come to understand that the mentally ill are a significant factor in the rise in crime. Early research in this area concentrated on the arrest rates of former psychiatric patients. These were discovered to be marginally higher than those of the general population or barely higher for specific offences. However, the differences disappeared when the arrest rates of former patients of mental hospitals were matched to samples that were matched for demographic characteristics. For a long time, there was a very optimistic view of the connection between violent crime and mental illness. Criminologists have put out a variety of theories as to why people turn to crime. Since the eighteenth century, biological explanations linking criminal behavior to inherent characteristics have been put forth; nevertheless, the scientific community has vigorously disputed these notions. The development of modern genetics has led to the identification of mutations in the chromosomal makeup of some individuals.