Criminologists study crime and justice within the social order. Sociologists study society and its social order. Some scholars think of criminology as a šeld of sociology, whereas others view it as a šeld of psychology. Criminology in recent years has become a separate šeld of study, and it has incorporated some of the theories from both sociology and psychology. Sociologists have been instrumental in helping law enforcement understand organized crime and youth gangs. Psychologists have helped law enforcement understand criminal behavior. ‚e FBI has developed a method called “prošling.” ‚is method uses crime scene evidence to determine the psychological makeup of a criminal. It is also used by other law enforcement agencies to identify drug tra¦ckers, serial killers, and rapists. ‚is chapter provides an overview of the šeld of criminology and the basic theories.