NOT on a fishing expedition? So what are you suggesting, that I closely fit the known appearance of a specific individual wanted for a specific crime, and I was allowed to go on my way simply because I told the guy I wasn't co-operating?

Or is it just a little more credible to believe that I was the victim of a targetting based at best on more or less random urges by the special officer, or at worst on racist, sexist or otherwise discriminatory criteria based on widely held but discredited stereotypes? And that when I pointed out to him that in a free society, there in no fishing allowed, he had no choice but to let me go on my way?

I don't think your hypotheses stand up to much scrutiny.