Control is relative though and nuanced. The question is one of initiative and nuance and a matter of trying to establish things up front. The officer can be l

Control is relative though and nuanced. The question is one of initiative and nuance and a matter of trying to establish things up front. The officer can be legally in control, and in control of some aspects (i.e. you are not free to go) but still not in control over where the social interactions/conversation leads. To give you an idea, I once got a warning (or maybe it was a greatly reduced speeding ticket, I don't recall) and found out the next day from someone who apparently knew the officer who pulled me over that I was suspected of having drugs in my car (which was a total misunderstanding, he saw some things he didn't recognized assumed they must be bongs or something and extrapolated from there). Go figure....