Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Philadelphia (CNN) -- There is one thing to be said about Attorney General Eric Holder. He has a way with words that makes conservatives furious -- especially when he starts talking about race and the law. There are many examples. Early in the Obama administration, Holder said that we are "a nation of cowards" when it comes to issues of race. The conservative chattering class erupted. Holder is at it again. He has fired up the right with his comments about the Trayvon Martin case, blaming "mistaken beliefs and stereotypes" for the shooting of the Florida teenager. And now he is going after Texas' voting laws.NEW: Eric Holder says Justice Department will go after Texas voting law after high court rulingAttorney general also has recently talked about race after George Zimmerman verdictSome conservatives have accused Holder of "race baiting"Obama has not backed away from Holder or his comments 
 Question:Civil rights organizations have called on Holder and the Justice Department to pursue federal charges against George Zimmerman after he was found not guilty in the _ shooting.

Trayvon Martin