Criminology is the study of the anatomy of a crime, specifically its causes, consequences and costs. Criminal justice, on the other hand, refers to established systems for dealing with crime, specifically detection of crime, detaining of criminals, and criminal prosecution and punishment. Criminal justice is directly associated with law enforcement. Students pursuing career opportunities in criminal justice will study the different components of criminal justice and law enforcement systems. Students pursuing a career as a criminologist will study the behaviour patterns, backgrounds, and sociological trends of criminals. While both fields are different, criminologists and criminal justice professionals work together in the criminal justice system to thwart crime.