my dad was a first responder and he taught me that most cops are bullies who are looking for an excuse to fuck up your day, so the best bet is to be respectful and polite and to make a good first impression. however if it's a situation that could potentially result in criminal charges, say nothing, only ask for your lawyer. the "am i being detained or am i free to go" thing works but i don't think it's a good idea to aggressively try and piss off cops who will then do whatever they can to fuck up your day
United States