Your complaint seems more like a failing legal system than unnecessary surveillance.
Legitimately if an investigator put a hard drawn sketch through facial recognition and that was even remotely allowed into evidence by the court then the suspect evidence wasn't the issue
I don’t recall the actual case but what I try to point out is that technologies are used as dragnets to “fish anything” be it facial recognition, cell tower logs or license plate reads. I’m all out in favor of using any tool to catch criminals but not to manufacture them, specially when the only goal is revenues for the agency du jour.
Legitimately if an investigator put a hard drawn sketch through facial recognition and that was even remotely allowed into evidence by the court then the suspect evidence wasn't the issue