86.4% of the US’s Chiefs of Police and Sheriffs “support nationwide recognition of state issued concealed weapon permits.”
76% of those same heads of departments believe that “qualified, law-abiding armed citizens help law enforcement reduce violent criminal activity.”
The entire survey is available here: NACOP survey results 2016. A 2013 Survey of Police by PoliceOne found similar results (available here).
The War On Guns: Arming Yourself Against Gun Control Lies
More Guns, Less Crime (University of Chicago Press, 3rd ed, 2010)
Straight Shooting: Firearms, Economics and Public Policy
Denied a Chance: How Gun Control helped a stalker murder my husband
Freedomnomics, see Chapter 4 for a general overview of the economics of crime
Dumbing Down the Courts: How Politics Keeps the Smartest Judges Off the Bench
[…] against open carry, campus carry and constitutional carry. Many, but not most. According to a recent survey . . […]