I’ve had some luck when I said to the police, “So, you’re admitting you don’t have probable cause, then,” when they threatened to make me wait for them to bring in drug-sniffing dogs. If they need to wait for the dog, they don’t have probable cause, that simple. If they had probable cause, they could search you immediately, without asking or waiting at all.
Make sure you get VIDEO of officers in action at any given stop. Also make sure, however, that the officer(s) know you are recording, as the whole point is to not let it escalate in the 1st place, plus many states (MD, for example) make it illegal to collect audio or video (but not always both!) w/o consent.
