Should the ethics committee (or equivalent) of Carnegie Mellon look into this?
It is one thing to find out flaws in the tor network, it is another to use it to indiscriminately snoop for the FBI.
The Carnegies and the Mellons are a couple of big-money families. They, along with others, run the government and control the FBI. It was probably Carnegie Mellon that called the FBI in, in the first place.
The larger education community can still act against individual researchers, if they were unethical.
Not sure if they have the backbone to do it though.