See http://volokh.com/2010/11/24/second-amendment-protects-gun-possession-by-the-housemates-of-felons/ I may be off in my earlier interpretation of the case. This one only applied to the POSSLQ.
Several more posts and cases listed: http://volokh.com/?s=constructive+possession
Several more posts and cases listed: http://volokh.com/?s=constructive+possession