The West Midlands Police and Crime Commissioner has hit out at the Independent Police Complaints Commission (IPCC), saying they "washed their hands" of the "plebgate" investigation.
Bob Jones told BBC's Daily Politics the Police Federation conducted "a very thorough investigation".
He said the probe was "supervised by the IPCC, the results of which were then put to three senior officers in three different forces, who all came to the conclusion on the facts and the legal advice that there was no case for levying any disciplinary action".
"That is a fair and open process which at any time the IPCC could have taken over and run themselves, they decided not to, they washed their hands of it and then made a rather inflammatory statement at the end," he added.
It's turning out to be a big week in the life of the story we call "plebgate".
West Mercia Police have confirmed they are reviewing a report on the 'Plebgate' scandal which is alleged to have been fundamentally altered.
Claims have emerged police officers changed the conclusions of a probe into a meeting between Andrew Mitchell and federation members.