United States v. Griffin, ___ F.3d ___, ___ (7th Cir., Jul. 5, 2012) (reversing federal conviction for felon in possession of firearms where there was no evidence defendant intended to exercise any control over his father's firearms in his parents' home where he went to live after being released from prison: a defendant's strong connection to the residence alone does not suffice to establish the nexus required to prove his constructive possession of a gun found in the residence.").