From a riveting article in The New Yorker on the raid that resulted in Bin Laden's Killing:
A second SEAL stepped into the room and trained the infrared laser of his M4 on bin Laden’s chest. The Al Qaeda chief, who was wearing a tan shalwar kameez and a prayer cap on his head, froze; he was unarmed. “There was never any question of detaining or capturing him—it wasn’t a split-second decision. No one wanted detainees,” the special-operations officer told me. (The Administration maintains that had bin Laden immediately surrendered he could have been taken alive.) Nine years, seven months, and twenty days after September 11th, an American was a trigger pull from ending bin Laden’s life. The first round, a 5.56-mm. bullet, struck bin Laden in the chest. As he fell backward, the SEAL fired a second round into his head, just above his left eye. On his radio, he reported, “For God and country—Geronimo, Geronimo, Geronimo.” After a pause, he added, “Geronimo E.K.I.A.”—“enemy killed in action.”
My article in the WSJ on the legality of the killing is here. These new details might raise some questions about whether a surrender option truly existed.