I finally got it yesterday. Does anyone else think that maybe Rudolph wasn't in anyone's pocket, but he was just pathological about everything bad/supernatural that happened to him was Harry and Murph's fault? Rudolph was a political weasel. He could have enough pull to take the case. We've seen that sort of thing before in the books.
Also, will Rudolph get (mortal) justice? Only Harry saw him murder Murph.