Body-worn cameras spread rapidly across U.S. police departments in the 2010s, accelerated by federal grants and high-profile incidents. Most large departments now equip patrol officers with cameras, though policies vary widely on when cameras must be activated, who can review footage, and how quickly (or whether) recordings are released to the public.
Research on body cameras has been mixed. Some studies find reductions in use-of-force complaints; others find little change. Outcomes appear to depend heavily on activation policies and supervisory enforcement. Cameras have also been credited with both exonerating officers and producing key evidence in misconduct prosecutions.
Debates continue over public-disclosure timelines (especially after critical incidents), officer review of footage before writing reports, data-retention periods, redaction of bystanders, and storage and infrastructure costs that fall heavily on smaller departments.