Your 84% statistic is bogus and you should stop using it.
Correction
Homicide
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%. The offending rate for blacks was almost 8 times higher than whites, and the victim rate 6 times higher. Most murders were intraracial, with 84% of white homicide victims murdered by whites, and 93% of black victims murdered by blacks