I would like to suggest something different. There are some scenarios when multiple criminals chase down cops and kill them, even if he/she was not fighting or just towing cars as a traffic officer. So, what I suggest is that "Police Officers will not be able to /quitjob if they were violent within the last 10 minutes." Because if a police officer is off-duty and wants to /quitjob , he should be able to do it whether there is a nearby wanted criminal or not.