California also released a dashboard that covers arrests and the number killed by law enforcement which is based on data that is maintained by the CA Attorney General's Office:

http://openjustice.doj.ca.gov/data

I've also done a little investigation into why the number of reported homicides by law enforcement during arrests has been trending upwards in recent years:

http://jonthewang.com/2015/10/06/homicide-by-law-enforcement...