In Minnesota, a recent study of carry permits shows that permit holders are 300% LESS likely to commit murder or manslaughter than the general population.
“Rate of carry permit holders committing murder and manslaughter/100,000 per year, .542.
Rate of murder in the general population in Minnesota, per 100,000 averaged for the years 2003, 2005 2012, is 1.78.”
It has been revised with better numbers.
It is now .542 for CCW holders,
.197 for the general population.
http://gunwatch.blogspot.com/2013/10/minnesota-carry-permit-murder-rates_16.html