A good cop is there when you need one.<br />
A bad cop is there when you really don't want to see one!
Honor and moral character defines a person as good or bad in my book.
A good cop helps people and knows his laws and boundaries; where-as a bad cop intimidates, uses his/her influence to corrupt and destroy people. The bad cops uses the law for selfish reasons.
They can both arrest you.....one just says please and thank you
Ones more of a meanie