California Department of Corrections, We're Partial to Blacks But We Also Beat Homos
California Department of Corrections is not affiliated with the state government. This activist organization "corrects" billboards to raise political awareness on issues for gays, women, the working class, and racial minorities. Their website provides more information at California Department of Corrections.
The billboard has been altered to read "We're partial to blacks but we also beat homos, hobos, & whores." This refers to the idea that policemen target oppressed groups and are often not treated with the same respect as their white heterosexual counterparts.