Lawsuit
Michael Williams jailed on ShotSpotter evidence
2021Michael Williams spent nearly a year in jail on ShotSpotter-based evidence before a judge tossed the case — fueling scrutiny of the technology's reliability in court.
RC
Individual
Robert Calhoun
Co-founder
An engineer who co-founded ShotSpotter alongside Robert Showen and Jason Dunham in 1996, helping build the early gunshot-location acoustic sensor system.
On the record
Companies
Incidents in their orbit
Investigation
89% of alerts, no gun crime found
2021A MacArthur Justice Center analysis found the vast majority of Chicago ShotSpotter alerts led to no evidence of a gun crime, driving claims it wastes resources and over-polices neighborhoods.
Ban / Halt
Chicago ends its contract
2024Facing accuracy disputes and community pressure, Chicago — one of ShotSpotter's largest deployments — declined to renew its contract.