There isn't really evidence. I collected lots of statistics from different countries and there's no real relationship.
https://steemit.com/guns/@starrychloe/gun-control-and-gun-ownership-has-no-effect-on-homicide-rates-either-way-six-charts-that-plot-freedom-and-homicide-rates-versus
RE: My "No-Bullshit" Guide to the Gun Control Debate: Please Add to It!