I believe that research would be continuing in this type of program. We do have independent research. I think it could be better than it is. It's done by the General Accounting Office, which represents the Congress. It has done research into the program and has looked at complaints of witnesses and how efficiently the program has operated.
The Office of the Inspector General is an independent body within the Department of Justice that has also investigated the witness program on more than one occasion.
There was one other group I can't recall that has done independent research in the program.
When I say “has done it”, I don't mean one time in 30 years, but at various times.