States with permissive gun laws have higher mass shooting rates, study finds: Average rates 11 percent higher and growing in permissive states, shrinking in restrictive states

States with more permissive gun laws and greater gun ownership have higher rates of mass shootings, and a growing divide

States with strict gun laws see more homicides when they border states with lax ones: Over a 5-year period, most guns found in states with strict gun laws were obtained from less restrictive states

Gun-related homicide rates in states with strict gun laws increase when neighboring states have less restrictive laws as a result