There isn't any good evidence either way. It's too hard to control the variables. It's possible that banning guns increased homicides from guns and other mean

There isn't any good evidence either way. It's too hard to control the variables. It's possible that banning guns increased homicides from guns and other means. It's possible that it prevented homicides from guns and other means. There is really no way to tell from the evidence. But it is certainly not clear that it helps.