[0.E.O]

So the Hillary Clinton "I don't recall" non-answer answer is the best route to go.

Basically if the police stop you the best course is to ask if you're being detained. If they say no then thank them politely and walk away. If they say yes then say 'get me a lawyer' and shut up.

[E. Pluribus Unum]

"Am I under arrest?"

"Am I free to go?"

"Am I being illegally detained?"