The difference is, a trafic cop doesn't want to arrest you. They don't want to book anyone, but their boss told them to go balance the books by fleecing drivers. If you make their job easier, they might let you off with a warning.
A cop who's investigating a real crime wants to get a conviction. And they aren't in a position to do plea bargaining (like a traffic cop), that's the DA's job (then the judge's, if it gets that far). It's not a terrible idea to negotiate with the DA and judge, but you need a lawyer to help you do it.
A cop who's investigating a real crime wants to get a conviction. And they aren't in a position to do plea bargaining (like a traffic cop), that's the DA's job (then the judge's, if it gets that far). It's not a terrible idea to negotiate with the DA and judge, but you need a lawyer to help you do it.