Study Credits Nonprofit Groups in Crime Decline By Crime and Justice News | November 9, 2017 LikeTweet EmailPrint More More on Crime Trends Subscribe to Crime Trends Most theories for the U.S. crime decline over the last 25 years have focused on the would-be criminals, reports the New York Times, including strict policing tactics, mass incarceration . . . Want to read more? Please subscribe to The Crime Report!