The Crime Statistics Bureau in San Francisco does not appear to exist, and the FBI has not yet released murder statistics for 2015. And the numbers included in the tweet highlighted by Trump do not reflect the numbers reported by the FBI in 2014.
The FBI reported in 2014 that 82 percent of murders with white victims were carried out by white people, while just under 15 percent were carried out by black people, according to the Huffington Post. And almost 90 percent of murders with black victims were committed by black individuals, while 7 percent were committed by white individuals.
According to Little Green Footballs, the graphic retweeted by Trump appears to have originated with a neo-Nazi Twitter account.
Trump's retweet follows his comments on Sunday that a Black Lives Matter protester violently removed from a Trump rally on Saturday perhaps "should've been roughed up" since his actions were "disgusting."