The American who shot dead two men in Lahore, triggering a diplomatic crisis between Pakistan and the US, is a CIA agent who was on assignment at the time.
Raymond Davis has been the subject of widespread speculation since he opened fire with a semi-automatic Glock pistol on the two men who had pulled up in front of his car at a red light on 25 January.
Pakistani authorities charged him with murder, but the Obama administration has insisted he is an "administrative and technical official" attached to its Lahore consulate and has diplomatic immunity.
Based on interviews in the US and Pakistan, the Guardian can confirm that the 36-year-old former special forces soldier is employed by the CIA. "It's beyond a shadow of a doubt," said a senior Pakistani intelligence official. The revelation may complicate American efforts to free Davis, who insists he was acting in self-defence against a pair of suspected robbers, who were both carrying guns.
Pakistani prosecutors accuse the spy of excessive force, saying he fired 10 shots and got out of his car to shoot one man twice in the back as he fled. The man's body was found 30 feet from his motorbike.
"It went way beyond what we define as self-defence. It was not commensurate with the threat," a senior police official involved in the case told the Guardian.