There are initial decisions to be made with the deployment of these automated policing tools. For example, this is from an EFF piece on predictive policiing[0]:

"For instance, if police put majority Black neighborhoods under intense police scrutiny and surveillance, they will be more likely than in other neighborhoods to make stops and arrests according to minor quality of life infractions. Therefore, derivative maps purporting to show where future crimes might be committed will disproportionately weigh those neighborhoods already living under the weight of intense police presence. This can create a self-fulfilling prophecy that uses the supposed objectivity of math to legitimize racially biased police procedures."

There is also a piece on other issues with license plate readers in particular.[1] I'd recommend the whole series if you're interested.[2]

[0]: https://sls.eff.org/technologies/predictive-policing

[1]: https://sls.eff.org/technologies/automated-license-plate-rea...

[2]: https://sls.eff.org/