Was Pat Tillman Assassinated?
In 2007, the Army recanted and said that he was a victim of friendly fire. 1) "First, there was no evidence of any incoming fire from the enemy, and no sign of damage to any man or equipment from enemy fire." 
2) "Several doctors, their names blacked out in the reports, said that the bullets were so close together that Tillman must have been shot by an M16 combat rifle - a highpowered repeat machine gun - fired from no more than ten yards."
"The Army doctors told the investigators that these wounds suggested murder and urged them to launch a criminal investigation."  This investigation never occurred. So, next question would be, is such a killing justifiable in any sense, and if so, how so?Tillman's family uncovered this as a "friendly fire" incident years ago.