[AppyPappy]

Not only that, the gunman could have bought a gun illegally.

[Dead Corpse]

(sarc)You mean people bent on using firearms in crimes might ignore gun laws? Oh heavens... maybe we need another law...(/sarc)

It isn't crazy people that is the problem here. It's career politicians and BATFE thugs trying to justify their existence by creating as many classes of "criminals" as possible. With your average citizen in full possession of their RKBA, criminals and nutcases tend to "Darwin out" as we shoot them.