I don't have a transcript and for all I know it could've been dumb or wrong or whatever, but apparently Bob Costas said to the football audience that absent a gun a football player probably would not have murdered his girlfriend and then killed himself.
Anyway, whatever one thinks the laws/constitution should be, or what the constitution/laws are, this isn't really debatable. As human beings we're capable of losing our shit, especially if we throw some drugs and alcohol into the mix. If you're a big football playing dude it's probably pretty easy to seriously hurt your less than big girlfriend in a moment of rage, but it's actually pretty hard to kill her. Unless you have a gun.