Hispanic - 62,669 (65.0%)
Black alone - 30,992 (32.1%)
White alone - 782 (0.8%)
Two or more races - 791 (0.8%)
Native Hawaiian and Other Pacific Islander alone - 684 (0.7%)
American Indian alone - 175 (0.2%)
Asian alone - 222 (0.2%)
Other race alone - 140 (0.1%)
http://www.city-data.com/city/Compton-California.html
Well in other news this week, the State population in general (if I understood the story correctly) is poised to tip to majority Hispanic in the near future.
So I suppose, this is just part of the larger trend.