At present, the best source for Obama Administration data on homicides by race is a 2011 PDF by Alexia Cooper and Erica L. Smith of the federal Bureau of Justice Statistics: “Homicide Trends in the United States, 1980-2008.” ... From page 2: 

Based on available data from 1980 to 2008— 

Blacks were disproportionately represented as both homicide victims and o?enders.…The o?ending rate for blacks (34.4 per 100,000) was almost 8 times higher than the rate for whites (4.5 per 100,000).