A crime (or misdemeanor or felony) is an act done by a person which is against the laws of a country or region. ... Things like killing another person, injuring another person, or stealing from another person are crimes in most countries. Also, it can be a crime to have or sell contraband such as guns or illegal drugs.Criminology is the study of the law enforcement and criminal justice system. A person looking for a career in criminal justice will likely first seek to earn a criminology degree. While criminal justice and criminology are certainly related fields, they are not identical. Criminology is the study of crime and deviant behavior. Criminology is an interdisciplinary field in both the behavioural and social sciences, which draws primarily upon the research of sociologists, psychologists, philosophers, psychiatrists, biologists, social anthropologists, as well as scholars of law. Cesare Lombroso (1835–1909), an Italian sociologist working in the late 19th century, is often called "the father of criminology." He was one of the key contributors to biological positivism and founded the Italian school of criminology.