“According to the US Department of Justice, blacks accounted for 52.5% of homicide offenders from 1980 to 2008, with whites 45.3% and “Other” 2.2%.”
https://en.wikipedia.org/wiki/Race_and_crime_in_the_United_States#Homicide
(Hispanics are part of “whites for this number.)
That is huge considering they only comprise 12-13%.