I agree with Grapeshot's comment in the other thread that this was a detention--the cop hand on their weapon.
Also, the demand for ID is telling. They weren't there to check his driver qualifications since they didn't ask for license and registration.
This needs to be hammered.
One possible way to address it is with a FOIA avalanche. A FOIA avalanche is when multiple people send FOIAs. It uses the bureacracy against itself. The idea comes from prisoners in the Soviet gulag. They discovered that every prisoner formal complaint had to be dealt with by the bureacracy. So, a whole bunch of prisoners got togther and started writing complaints. We're talking numerous prisoners, organized, writing six complaints or more a day. It completely jammed the system, nothing else was getting done by the bureacracy. One complaint was apparently misrouted to the Politburo. By the time it was all done, things were better, at least one prisoner was released, and the warden was retired early. The prisoners used the bureacrats fear of not following the rules against them. If a bureacrat doesn't follow the rules, its a black mark on his record, and for a junior executive, starts to open the door for an ambitious subordinate who wants his position.
A FOIA avalanche would use the statutory requirement to comply and, if it exists in a police department, the unwillingness to not follow the rules.
FOIAs to FCPD go to internal affairs I believe. I have this vague recollection they go to the inspections section.
So, if NoVA guys want to get a FOIA avalanche going, its probably smartest to organize it off-forum by PM. I'll make a list in another post below of possible things to FOIA, and then we can split up the list. That way we can send multiple FOIAs without duplication.
First, though, we need to get some details, both for the FOIA, and to make sure we're not just barking up the wrong tree.