Many homeless get pieces by committing vehicle burglaries. Lots of idiots leave guns in their vehicles, unsecured or secured very sloppily.Hmmm... I would doubt that many "homeless" people could afford a firearm (not even a cheap one on the Black Market)...
I've taken a shocking amount of reports for guns stolen from vehicles over the last year. Latest one was for a Desert Eagle 50 AE, FN P90, and a S&W 50 snubbie...plus approx 200 rds of primo defensive ammo. Guy was drunk and left his truck door wide open in his driveway.
Guy before that lost a Ruger 357 and a suppressed American in 300 Blackout, plus 1k rounds of subsonic ammo. Left it in his truck after a night of hunting hogs.
Last arrest involving a stolen gun was a homeless dude with a brand spanking new Hellcat, with RDS and 3 spare mags. Took it out of a truck two towns up the highway.