The Crime Prevention Research Center is a 501(C)(3) tax exempt, educational organization, and does not accept donations from gun or ammunition makers or organizations such as the NRA or any other organizations involved in the gun control debate on either side of the issue.
Here are the people who have donated to the CPRC.
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
Stalked and Defenseless: How Gun Control Helped My Stalker Murder My Husband in Front of Me
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