edit: Here are some studies. I would have put them in a reply but I'm being rate limited. Any one is sufficient on its own, but all are interesting.
http://www.unz.com/article/race-and-crime-in-america/
http://2kpcwh2r7phz1nq4jj237m22.wpengine.netdna-cdn.com/wp-c...
https://link.springer.com/article/10.1007%2Fs10940-011-9134-...
http://www.sciencedirect.com/science/article/pii/S0160289611...
http://www.jstor.org/stable/591624?seq=1#page_scan_tab_conte...
http://www.sciencedirect.com/science/article/pii/S0160289609...