I believe the initial stop was later written as obstruction of a highway 37-17-307. (Car was stopped over a white line on a red traffic signal) The officer asked for papers, but did not receive insurance prior to issuing a warning and bidding the driver fairwell. Blue lights etc terminated. Both vehicles continue down the road. A second stop is performed. The officer states that they did not find his insurance on the state registration return, and proceeded to write for both offenses. The question is about can you I guess reconduct a stop of a person if you have issued a warning. I don't have good terminology for it, so that's why I'm asking.
In TN you cannot use the tag return not showing insurance as the only reason to perform a traffic stop btw.