The director of public prosecutions, Keir Starmer QC, said his office had advised the Metropolitan police there was insufficient evidence to prosecute the officer, known as Witness B, for any criminal offence arising from an interview with Mohamed in Pakistan on 17 May 2002.
Starmer said Scotland Yard was continuing a wider investigation into “other potential criminal conduct” arising from allegations made by Mohamed.
Concern within MI5 over the unprecedented police investigation into “possible criminal wrongdoing”, which has lasted more than a year, was reflected in a statement made by the head of the agency, Jonathan Evans.
“I am delighted that after a thorough police investigation, the Crown Prosecution Service has concluded that Witness B has no case to answer in respect of his interviewing of Mr Binyam Mohammed,” he said. Evans continued: “Witness B is a dedicated public servant who has worked with skill and courage over many years to keep the people of this country safe from terrorism and I regret that he has had to endure this long and difficult process.”