It seems like this article buried the best lede of the story on paragraph ten, which explains Flock's new business of surveillance drones launched in response to 911 calls (and also presumably triggered by other alerts configured by police and private businesses).

> Flock has recently expanded into other technologies... Most concerning are the latest Flock drones equipped with high-powered cameras. Flock's "Drone as First Responder" platform automates drone operations, including launching them in response to 911 calls or gunfire. Flock's drones, which reach speeds up to 60 mph, can follow vehicles or people and provide information to law enforcement.