Criminal justice: areas of study and key players field of criminology can be broadened by studying various institutions involved that fall within one of the three general areas of criminal work: How do we come to know what we know about crime and criminal. Justice? crime constitutes significant portion of news portrayed in the media where it is usually exaggerated police are usually seen as the fighters of war on crime shows viewer than crime must be fought rather than prevented. Thunder bay has highest crime rate followed by saskatoon and regina. 12 months self reported rate was unchanged since 2004. Who are the criminals? attrition: the filtering process that criminal cases undergo as they move through the criminal justice system. In european context no early law enforcement prior to 19th century. Emperors defended their power and those who did not comply dealt with the wrath of their armies.