To the list of references provided by this post in the section "Further Reading," I would add the following book:

Sarah Brayne (2020) Predict and Surveil: Data, Discretion, and the Future of Policing, Oxford University Press

https://www.amazon.com/Predict-Surveil-Discretion-Future-Pol...

An academic study about the use of surveillance technology at the Los Angeles Police Department, the book documents the LAPD's use of data brokerage firms (e.g., Palantir) that collect and aggregate information from public records and private sources, as well as automatic license plate readers like Flock, and Suspicious Activity Reports generated by police and civilians, which include reports of mundane activities such as using binoculars, drawing diagrams, or taking pictures or "video footage with no apparent aesthetic value." All this data ultimately gets parked in Fusion Center facilities, built in the aftermath of 9/11, where federal, state and local law enforcement agencies collaborate to collect, aggregate, analyze and share information. As the author observes, "The use of data in law enforcement is not new. For almost a century, police have been gathering data, e.g., records of citations, collisions, warrants, incarcerations, sex offender and gang registries, etc. What is new and important about the current age of big data is the role in public policing of private capitalist firms who provide database systems with huge volumes of information about people, not just those in the criminal justice system."