Bureau of Justice Statistics Special Report: Race and Hispanic Origin of Victims and Offenders, 2012-15 [open pdf - 466KB]
From the report: "During the 4-year aggregated period from 2012 to 2015, half (51%) of violent victimizations were intraracial--that is both victims and offenders were the same race or both were of Hispanic origin [...]. During 2012-15, the percentage of intraracial victimization was higher than the percentage of interracial victimization for all types of violent crime except robbery. There was no statistically significant difference between the percentages of intraracial and interracial robbery victimization during this period. This report uses data from the Bureau of Justice Statistics' (BJS) National Crime Victimization Survey (NCVS) to examine the race and Hispanic origin of victims age 12 or older and offenders of violent victimizations."
Bureau of Justice Statistics: https://www.bjs.gov/