On the evening of Aug. 23, during the final hours of the battle for Tripoli, a 26-year-old lawyer named Mustafa Abdullah Atiri was lying, exhausted, against the back wall of a filthy tin-roofed warehouse crammed with 150 prisoners. He had been beaten and tortured every day since Col. Muammar el-Qaddafi’s soldiers arrested him four days earlier. It was just after the muezzin’s first call to evening prayer — about 10 minutes before 8 — when a pair of guards walked to the door, raised their AK-47 rifles and began spraying the men with bullets. Another guard threw a grenade into the densely packed crowd. Bodies fell on top of Atiri with the first fusillade, protecting him from the blast. Then the guards opened fire again. Blood began seeping down from the bodies above, soaking his jeans. As the officers walked back across the yard to reload, a guard named Abdel Razaq, who had shown the men some small mercies over the previous days, went to the door and shouted at the survivors: “Run! Run!”
