I'd call it more of a liberal/corporate/big government bias than a racial bias.
When there's a slant to the national news, it seems to me to always be one of the three.
In this case, and seeing the suspects in this case are black
Pat Mahaney who was attacked by 6 black teens in August of 2012 because they were bored died. So can these 6 be tried for murder now? , I guess you're referring to race not being cited much as a factor here? I'd ascribe that not so much racial as liberal "for a cause", IMO. The "cause being" the racial divide the national media stirred up in the Zimmerman trial, and how groups like MSNBC want to portray it, which is kinda racial I guess.