• MacArthur Justice Center

375 East Chicago Avenue

Chicago IL 60611

160 East Grand Avenue

Chicago IL 60611


The MacArthur Justice Center’s study on ShotSpotter, a gunshot detection system in Chicago, shows that 89% of alerts turn up no gun-related crime and 86% no report of any crime at all.


In 21 months, that totals over 40,000 dead-end police deployments.


The complete findings of the study can be found at

Key Cases