I recently discovered a company called Flock which apparently is building a massive surveillance network. I came across a reddit post on r/sysadmin where an admin received a request to install a black box device so that law enforcement could access cameras.
https://en.m.wikipedia.org/wiki/Flock_Safety
https://www.aclu.org/news/privacy-technology/how-to-pump-the-brakes-on-your-police-departments-use-of-flocks-mass-surveillance-license-plate-readers (disclaimer: I don’t support the political views of ACLU)
What do they look like?
https://www.flocksafety.com/devices/lpr
https://www.flocksafety.com/flock-os
https://www.flocksafety.com/use-cases/real-time-crime-center
https://www.cehrp.org/dissection-of-flock-safety-camera/