A tenant disputing a lease on a public sidewalk — voice raised, no weapon in sight — could have triggered a Flock “distress alert” and summoned an armed police response. That scenario wasn’t paranoia; it was an active pilot. Flock Safety, the surveillance company behind thousands of license plate reader cameras nationwide, spent nine months testing software that turned its citywide gunshot sensors into screaming detectors. After sustained pressure from the Electronic Frontier Foundation and civil liberties advocates, Flock announced in July 2026 it was pulling the feature. The screaming classifier is gone. The microphones are not.
Flock’s audio product, originally called Raven and now branded Audio Detection, uses high-powered microphones mounted on poles throughout cities. In October 2025, the company added Distress Detection: a software classifier designed to flag sounds of “human distress” and automatically alert law enforcement. Early marketing materials showed a police alert labeled “screaming.” After EFF reported on the upgrade, Flock quietly swapped that word for the vaguer “distress” — a small edit that speaks volumes about how surveillance vendors manage their public image.
“Audio detection is designed to recognize specific sound events, not people,” Flock stated in a July 2026 blog post. That reassurance lands differently when the company’s own earlier ads depicted a human scream triggering a police dispatch.
The Screaming Detector Problem
Acoustic detection already struggles to distinguish fireworks from gunfire — layering human voice classification on top multiplied the risk considerably.
The accuracy track record here is not encouraging. In Champaign, Illinois, nine months into a Raven pilot, only 8% of alerts led officers to scenes where shots appeared to have actually been fired, according to USA TODAY — a figure that makes the system look less like precision policing and more like an expensive noise complaint hotline. Most false positives were fireworks. EFF pointed to Chicago, where gunshot detection misclassified fireworks and police responded by shooting at children. Adding human distress classification to that track record meant any loud interaction on a public street could summon an armed response.
Gun violence is a serious problem. A microphone that can’t reliably distinguish a bottle rocket from a gunshot isn’t the solution.
EFF also raised likely conflicts with state eavesdropping laws, arguing Flock appears to have piloted Distress Detection without thoroughly vetting local legal frameworks first — a pattern advocates describe as surveillance vendors moving fast and asking forgiveness later.
Public Pressure Moved the Needle – Partially
Flock pulled the feature after advocacy campaigns demonstrated that organized public pressure can force surveillance vendors to roll back controversial capabilities.
Flock’s blog acknowledged removal “after careful consideration and community consultation.” Spokesperson Paris Lewbel confirmed to USA TODAY the feature is inactive but declined to answer whether law enforcement ever used it in practice. EFF framed the outcome as evidence that “public pressure can sometimes work to influence both companies and lawmakers that control a city’s purse strings.” The ACLU’s “Get The Flock Out” campaign has contributed to contract cancellations in multiple cities. Jackson, Mississippi ended its Flock gunshot detection deal entirely.
Flock compared its system to an Amazon Alexa — activating only upon detecting a “public safety event.” But unlike an Alexa, this device doesn’t sit in a private home waiting for a wake word. It blankets public streets, and its definition of a triggering event is written in software by the vendor, not voted on by residents.
The on-device classifier still processes audio in rolling five-second windows, flagging:
- gunshots
- fireworks
- car crashes
- sideshows
- “community disruption”
Those categories live in software. Software gets updated — often quietly, often without renewed public consent, exactly as Distress Detection arrived in the first place. The fight over what your city’s microphones are allowed to hear is far from finished.
