Who didn't already know that?
http://www.americanthinker.com/articles/2017/10/dont_tell_the_left_more_guns_fewer_homicides.html
Gun ownership increases by 50 percent, and homicides decrease by 50 percent. How can that be?
http://www.americanthinker.com/articles/2017/10/dont_tell_the_left_more_guns_fewer_homicides.html