yep yep
We've assumed the OPs friend was the victim here...I really hope that's the case......but (ya'll knew that was coming)
if I knew or had a real good idea I had bought a stolen weapon and ended up getting caught with it, I can't think of a better story that "I got it from some random dude at a gun show in a private sale"
http://www.southparkstudios.com/clips/153188/some-puerto-rican-guy
It was "some Puerto Rican guy".