Plebgate: Mitchell supporters demand answers about Met Commissioner's role But the Met launched a criminal inquiry after CCTV footage emerged which cast doubt on parts of an official police log that had been leaked to the media. It also emerged that a crucial email purportedly written by a member of the public who claimed to have witnessed the spat had in fact come from an off duty police officers who was not present. Operation Alice, which is being overseen by the Independent Police Complaints Commission (IPCC), was established to trace the source of alleged leaks to the media. In March the Met passed a file on the matter to the Crown Prosecution Service for consideration. But Mr Mitchell was left furious when reports appeared in the press suggesting the investigation had found nothing to contradict the police officers" original account. In the event the CPS said the file was unsatisfactory and asked the Met to conduct further investigations. Friends of the MP now want to know where newspapers obtained the information and are concerned that details of the secret file could have been leaked from the top. They have demanded that any transcripts, recordings or notes of the meeting are released in order to establish what exactly was discussed at Sir Bernard's meeting with the journalists. A spokesman for Scotland Yard said: "The Commissioner's meetings with journalists are part of the MPS having an open and professional relationship with the media. Such meetings are documented in our media contact register which is published on the MPS website. The Commissioner has been repeatedly questioned about Operation Alice by members of the Home Affairs Committee and by journalists, including in the meetings with a variety of publications on the 25th and 26th March which are documented in our media contact register. He has always sought to allow the MPS to be held to account by providing accurate information whilst protecting the integrity of the investigation. Former shadow home secretary David Davis has written to Sir Bernard to ask for details of what was discussed at the meeting to be released. Following the Leveson report Sir Bernard insisted that all meetings between police officers and journalists were officially recorded.