This guy claims to have sold him the weapon.....
http://www.dailymail.co.uk/news/art...ought-AK-47-parking-lot-Texas-Target-600.html
Seems Mr. Crews isn't no angel either, three separate incidents of resisting, criminal mischief and possession.
I would say with that alone his word that this actually happened probably isn't worth much. Could be just some one looking for attention as much as it could be true.