Costas, O.J. Simpson didn't need or use a handgun to kill Nicole and her boyfriend. He just forgot the suicide part.
In the 90s WRKO Boston host Gene Burns made the point after the Long Island Railroad incident that if someone on that train had a gun, there could have been fewer victims (if they could have wounded or killed the shooter). It’s a tough call, I know. 6 of Colin Ferguson’s victims died. Colin still breathes.
http://en.wikipedia.org/wiki/Long_Island_Rail_Road_massacre