A LA Times propaganda piece about the 'success' of the killing campaign waged by the U.S. in the tribal areas of Pakistan includes this line:
The offensive has been aided by technological advances and an expansion of the CIA's Predator fleet. The drones take off and land at military airstrips in Pakistan, but are operated by CIA pilots in the United States. Some of the pilots — who also pull the triggers on missiles — are contractors hired by the agency, former officials said.
Government officials like soldiers, policemen or even CIA agents have certain immunities when are ordered to kill someone. Civilian contractors do not have these nor should they have them. Civilians pulling the trigger to kill in a non defensive situation are committing first degree murders.
Where is the federal prosecutor going after these?