The routine activity theory was introduced by Lawrence E. Cohen and Marcus Felon. Both Cohen and Felon used a different approach to routine activity which was an extension to the human ecology analysis of crime and victimization rate over time. The change was structured for everyday life which had an affect on the crime against people and property. Cohen and Felson who developed the routine activity theory suggest that for a crime to occur there would have to be three factors. 1. There must be a motivated offender (teenage boys, an unemployed person, or drug addicts). 2. There is a target of opportunity (an unlocked car or a home). 3. Also the absentee of protection (police, homeowner, or a security system).
