You don't have to talk to them. When you stop there is usually no way to proceed unless they have evidence. I would never agree to an interrogation for anything

You don't have to talk to them. When you stop there is usually no way to proceed unless they have evidence. I would never agree to an interrogation for anything or any reason. You never know if they are going to consider you a suspect. Just flat out refuse. If you want to help the cops out with what you know, get a lawyer first.