Yet another attack in revenge of Trayvon Martin's death, this time in DC

I have compiled previous revenge cases here and here.  Most of these cases seem to involve blacks against whites, not Hispanics even though Zimmerman is Hispanic and 1/8th black.  Here is another case from Washington, DC in the Washington Times:

“This is for Trayvon Martin.” 

That’s what one of three black men told a white man as they approached him early Saturday in Washington before committing what police are saying may be a hate crime, according to Metropolitan Police Officer Anthony Clay. 

The men kicked the man, who was not identified, as they took his iPhone and wallet, the officer said Sunday, according to CNN. The victim suffered minor injuries and refused medical treatment. 

There have been no arrests, but police are investigating the incident as a hate crime, the officer said. 

“There is no pattern in these types of crimes. These attacks are outrageous; we are doing everything in our power to see that they certainly don’t occur. If they do occur, we are going to aggressively investigate them and bring people to justice,” Metropolitan Police Department spokesman Araz Alali said. . . .