I just read this on Wikipedia, from a US Survey:
Homicide

US homicide victims by race, 1980–2008[40]

US homicide convictions by race, 1980–2008[40]
According to the US Department of Justice, African Americans accounted for 52.5% of all homicide offenders from 1980 to 2008, with Whites 45.3% and "Other" 2.2%. The offending rate for African Americans was almost eight times higher than Whites, and the victim rate six times higher. Most homicides were intraracial, with 84% of White victims killed by Whites and 93% of African American victims killed by African Americans.[41][42][43]

In 2013, African Americans accounted for 52.2% of all murder arrests, with Whites 45.3% and Asians/indigenous Americans 2.5%. Of the above, 21.7% were Hispanic.[44][45]

Blacks account for the majority of gun homicide victims and arrestees in the US while Whites (including Hispanics) account for the majority of non-gun homicide victims and arrestees. Of the gun murder victims in the United States between 2007 and 2016, 57% were black, 40.6% white (including Hispanic), 1.35% Asian, 0.98% unknown race and 0.48% indigenous American. Non-gun homicides represented about 30% of total murders in the time period. Blacks were also over-represented in such homicides, although only by about 2.5 times their share of the general population.[46] Of the non-gun murder victims in the United States between 2007 to 2016, 61.5% were white (including Hispanic), 32.9% black, 2.29% Asian, 1.89% unknown race and 1.43% indigenous American.[47]

I don't think it tells us much except that most black victims were killed by black offenders and most white victims were killed by white offenders, which is pretty much as you'd expect in a country where the two don't generally mix too much.