From the AP (exerpted):
In two letters released Wednesday, Thomas Van Flein called the investigation “unlawful and unconstitutional” and said the man hired to run it, former prosecutor Stephen Branchflower, has a conflict of interest because he’s a friend of the fired commissioner. Citing “your seemingly biased conduct of the investigation in recent weeks,” he urged Branchflower to stop interviewing witnesses — the second time this month that he’s asked Branchflower to stand down.
The investigation has included setting up a secret tip line to “accept and investigate anonymous rumors and complaints outside the scope” of the inquiry, Van Flein alleged. He also said Branchflower has deposed witnesses without proper notice other attorneys.
Sounds like they’ve been taking lessons from Texas Travis County District Attorney Ronnie Earle.