Raymond A. Davis, center, is escorted to court by Pakistani security official in Lahore, Pakistan on Jan. 28, 2011. The American arrested in Pakistan after shooting two men at a crowded traffic stop was part of a covert, C.I.A.-led team of operatives conducting surveillance on militant groups deep inside the country, according to American government officials. Working from a safe house in the eastern city of Lahore, the detained American contractor, Raymond A. Davis, a retired Special Forces soldier, carried out scouting and other reconnaissance missions as a security officer for a Central Intelligence Agency task force of case...