yep, gun control wouldn't make much of a difference. In Canada, some kid got an AK47 for $1500 off the black market easily. Mental health wise, I wouldn't be that surprised, since there was a recent murder suicide by Jovan Belcher that was made the front news; this could be another case of copycat suicide.
http://en.wikipedia.org/wiki/Copycat_suicide#Social_proof_model