Do American police officers have a shooting problem?

There has been a lot of media attention on police use of force in the United States, especially officer-involved shootings (OIS). Do American police officers have a shooting problem?
How many people are killed by police every year? Break down the stats by armed v. unarmed and by race,
etc.
Make sure to include OIS statistics from more than one department – compare and contrast in previous years,
regions etc.
Do you personally think the police have a ‘shooting problem’ after viewing the statistics and studied them?
What’s an Early Warning System in policing? Discuss and explain.
How can police departments mitigate or reduce OIS? What are some of the best practices for reducing
OIS?
What are some best practices in investigating OIS?