evidence: • Black-on-black murders: From 1980 through 2008, 93 percent of black victims were killed by black offenders, according to a 2011 report on homicide trends by the Bureau of Justice Statistics. It also says 84 percent of white victims were killed by white offenders. In short, more often than not, people kill their loved ones, friends and neighbors — and since people of different racial backgrounds tend to live clustered together, they are far more likely to kill someone of their own race than someone of another race. [...] PolitiFact found that it was a back-of-the-napkin estimate based on the number black homicide victims in 2005, adjusted with the fact that 93 percent of black murders are intraracial. This reslt was divided by 365 to get an average for black-on-black killings per day. Finally, this was multiplied by 513 for the number of days between Trayvon's shooting and Zimmerman's acquittal.