Petra
Cult Mother and Simpering Cunt
As far as I know people have the right to request identification that somebody is indeed an law enforcement officer when they are stopped by one for something. (That means being able to see the identification card they carry and not just a badge.) Or at least they are allowed to see it at the first reasonably practical moment, which is usually right away for all non violent situations where action doesn't need to be taken right away.
It depends on the state, but I think for most of them once you become a sworn law enforcement officer you have the same authority in or out of uniform (this is why they have to sign codes of conduct for on and off duty).
If they're off duty and out of uniform and they say they're law enforcement, you have the right (and you should) ask for ID if they didn't already show it. Just don't have an attitude about it.
I was pulled over by a plain clothed officer for a taillight being out on a very lonely road between Palm Beach and Okeechobee once...not only did I drive a few more miles up the road to someone's driveway, but I asked for ID and badge number and called to confirm he really was an officer before getting out of my car. He was a little pissed for my wasting his time, but it was at the time where there were some instances of imposters pulling lone women over and raping them.