As a pro-gun criminologist, I can say with certainty that increased gun ownership does not cause more crime. It is very possible to read the statistics and conclude that increased gun control = increased crime and vice-versa. However, other factors are at play in a lot of these killings (the drug trade, personal and gang-related fighting, economics, etc). What we do know is that gun ownership has no effect on crime (and may decrease it). In all, gun control is a failed criminal justice policy that erodes liberty.