Since this incident first came up it has been discussed at length on OCDO, unfortunately some of the older threads have been lost(?).
Being that I lived around the corner from where this incident supposedly happened myself and another OC'er (he lived about 3/4 mile away) took it upon ourselves to find out if it was true.
What we discovered was that the incident was not as claimed but a ruse.
The gun was not stolen and the alleged victim filed a false report.
We came by this by contacting the Fairfax County PD Sully District, as that is who investigated the claim.
Sorry, I can't remember who I spoke with, it's been a few years.