Since the Ferguson, Mo., shooting, there have been renewed calls for police departments to hire more minority officers, but it turns out it's not that simple.
Police in the U.S. are more diverse than they were a generation ago. In the 1980s, 1 in 6 officers belonged to an ethnic or racial minority. Now it's about 1 in 4. The challenge these days is finding enough recruits to keep that trend going.