ShotSpotter and the Misfires of Gunshot Detection Technology

By Helen Webley-Brown, Anna Sipek, Katie Buoymaster, Juliee Shivalker, Will Owen, Eleni Manis, PHD, MPA

U.S. cities are squandering money on ShotSpotter’s unproven gunshot surveillance technology. 

• ShotSpotter surveillance increases police activity, but it wastes officers’ time. One major study of the technology showed that ShotSpotter fails as an investigative tool, providing no evidence of a gun-related crime more than 90% of the time and producing exceedingly few arrests (less than 1 per 200 stops) and recovered guns (less than 1 per 300 stops).

• ShotSpotter fails the Black and Latinx communities where it appears to be disproportionately deployed. The tool increases police activity and the risk of police violence without producing any significant effect on firearm offenses or on shooting victims’ medical outcomes.