...when the nice police officer tells you to stop...STOP!
IMO, good advice for any encounter with LEOs. Do what you are told. If you think that your rights have been violated, sue (later). A confrontation or worse with an LEO on the street will inevitably end up with you losing. We have a number of LEOs on the forum, and I'm sure they can tell many stories about how when they are looking for/chasing an armed felon and run into someone who fits the description (but later turns out is not the bad guy)and who decides that his rights are being violated and argue/resist the officers. Not a good situation.