Spiffy conclusion. I have about 50 books next to me dealing with crime and punishment from Mesopotamia to present day and murder, heinous or otherwise, crops up rather a lot in them, before and after the invention of the gun. Gun control deals, one could argue, with the legal acquisition of firearms, obtaining licenses and such. Criminals, being right rapscallions, rarely bother with such niceties. So gun control does, indeed, limit the possibility of one getting gunned down by a person who has legally acquired a gun. It does not, however, do jack-diddley to prevent you getting shot by some shady character who purchased a firearm with the serial number filed off...or stabbed..or strangled...or bludgeoned...run over...tazed....decapitated...shot with a bow'n'arrow/crossbow...poisoned...hung...no guns would definitely limit the possibility of getting murdered.