After the incidents of police using force in 2014 and 2015 it became a popular for outside agencies to investigate incidents of police use of force.
Here is an example of the California AG Investigation on the Stephon Clark shooting.
With a $20 million lawsuit and two criminal probes into the Stephon Clark shooting looming, state Attorney General Xavier Becerra has released a report with 49 recommendations for improving Sacramento police. Police Chief Daniel Hahn asked for the report following Clark’s death at the hands of two officers last March.
— Read on amp.sacbee.com/news/state/california/article225242250.html
The report can also be accessed HERE
Future of Policing 