Hello my brother has a CPL and obviously a pistol for a few years now but has had no run-ins with the law since obtaining the CPL and pistol yet a few months ago he went to purchase a shotgun at a gun store and was denied after doing the background check, what could be the possible cause of this happening that doesn't make sense to me and he is clueless or so he says, he does have a domestic assault charge like 5 or more years prior to obtaining his CPL but if that was the reason for being denied the purchase of a long gun shouldn't he have been denied the CPL? Thank you in advance for any answers!