The Grand Jury heard testimony from all witnesses. However they seem to have given greater credence to the witnesses, all black people, who didn't go to the media prior to testifying, because their testimony agreed completely with officer Wilson's testimony. They were afraid for their lives, and those of their families, if they told the truth publicly, but in the anonymous Grand Jury testimony, they could tell the truth safely, without being attacked by the animals that infest their neighborhood. That, and the fact that some of the lying "witnesses," decided to recant their previous lies about what happened, when they realized that perjury, could get them a long jail sentence, proved to the Grand Jury that officer Wilson told the truth, and Michael Brown was the criminal that everyone in the hood knew that he was.