This says police killings are at about 1200 per year.
This is not a real datapoint. We quite a few cases of wrongful stops or arrests, but there is only one case where it escalated to physical damage (Brandon Upchurch).
Only about 10% of officer involved shootings come from traffic stops, which is what we're talking about when we're talking about Flock license plate readers.
That is shockingly bad. Where police officers can be identified, about 10% have shot someone before.
Citation needed.