I am sorry but I can't speak for Mr. Levin. Possibly he was talking about a "Select Committee" which could be set up for the specific purpose of conducting the investigations but it would still be a legislative body and would have to defer to the Justice Department for any criminal prosecution. I may be in the minority, but would counsel patience. So far, the appropriate congressional committees are doing a good job and setting up a select committee would just delay the process. Jumping on Speaker Boehner for not doing something he has no authority to do certainly does not help the situation.
All the sources that I looked up indicate that a special prosecutor may be appointed by the judiciary or by Congress.
If we don’t get any names soon, this investigation/ prosecution will go nowhere.