It's been claimed the Home Office covered up a catastrophic blunder when two drug barons duped a Tory Home Secretary into releasing them from prison.
Michael Howard managed to get a royal pardon for Liverpool career criminals John Haase and Paul Bennett in return for key information regarding illegal arms. A former senior Scotland Yard detective claims the evidence about the scam was redacted so the botch would not be reported.
The fallout then continued for years, ex-Detective Chief Superintendent Michael Hallowes claims, with unrecovered weapons used in high-profile killings years later.