Officers use of lethal force following an arrest for a violent felony is more than twice the rate for white as for black arrestees, according to one study.
http://policingequity.org/wp-content/uploads/2016/07/CPE_SoJ_Race-Arrests-UoF_2016-07-08-1130.pdf
Another study showed that officers were three times less likely to shoot unarmed black suspects than unarmed whites.
https://www.washingtonpost.com/news/true-crime/wp/2016/04/27/this-study-found-race-matters-in-police-shootings-but-the-results-may-surprise-you/?hpid=hp_rhp-more-top-stories_no-name:homepage/story