Brown family lawyer: We are seeking AG’s assurance that process will be fair, transparent

(CNN) – Attorney General Eric Holder arrived in Ferguson, Missouri, Wednesday and made a pledge to the community that the federal investigation into the police shooting of an unarmed black teenager would be "fair and independent."

Holder will meet with the family of 18-year-old Michael Brown to hear their concerns about how this investigation might play out.

"At a minimum, I think they want to be assured that the process will be fair, that it will be transparent which is what they've been calling for from the very beginning. So they're hopeful that this meeting will add that reassurance that they've been looking for since day one," said Anthony Gray, co-counsel for the Brown Family.

The county prosecutor overseeing the case said it could take until mid-October to hear all of the evidence related to the shooting.

The Brown family understands it will take time for the grand jury to review evidence, but "in their estimation, it shouldn't take long to draw a conclusion," said Gray.

"We thought from the very beginning that the prosecutor could have looked at the evidence and filed his own information. He didn't necessarily have to go to a grand jury, and that decision would have been made a long time ago," he said.

For more of our interview with attorney Anthony Gray, check out the video above.