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.
http://www.guardian.co.uk/world/2011/feb/20/us-raymond-davis-lahore-cia
Tellingly:
The New York Times had agreed to temporarily withhold information about Mr. Davis’s ties to the agency at the request of the Obama administration, which argued that disclosure of his specific job would put his life at risk. Several foreign news organizations have disclosed some aspects of Mr. Davis's work with the C.I.A.. On Monday, American officials lifted their request to withhold publication, though George Little, a C.I.A. spokesman, declined any further comment.
In other words, the NYT knew about Davis' work for the CIA (and Blackwater) but concealed it because the U.S. Government told it to. Now that The Guardian and other foreign papers reported it, the U.S. Government gave permission to the NYT to report this, so now that they have government license, they do so -- only after it's already been reported by other newspapers which don't take orders from the U.S. Government.
http://www.salon.com/news/opinion/glenn_greenwald/2011/02/21/nyt/index.html