He was a smooth-faced kid, about 15 years old. Not much younger than they were: Morlock was 21, Holmes was 19. His name, they would later learn, was Gul Mudin, a common name in Afghanistan. He was wearing a little cap and a Western-style green jacket. He held nothing in his hand that could be interpreted as a weapon, not even a shovel. The expression on his face was welcoming. “He was not a threat,” Morlock later confessed.

Morlock and Holmes called to him in Pashto as he walked toward them, ordering him to stop. The boy did as he was told. He stood still.

The soldiers knelt down behind a mud-brick wall. Then Morlock tossed a grenade toward Mudin, using the wall as cover. As the grenade exploded, he and Holmes opened fire, shooting the boy repeatedly at close range with an M4 carbine and a machine gun…

After the killing, the soldiers involved in Mudin’s death were not disciplined or punished in any way. Emboldened, the platoon went on a shooting spree over the next four months that claimed the lives of at least three more innocent civilians. When the killings finally became public last summer, the Army moved aggressively to frame the incidents as the work of a “rogue unit” operating completely on its own, without the knowledge of its superiors. Military prosecutors swiftly charged five low-ranking soldiers with murder, and the Pentagon clamped down on any information about the killings. Soldiers in Bravo Company were barred from giving interviews, and lawyers for the accused say their clients faced harsh treatment if they spoke to the press, including solitary confinement. No officers were charged.

But a review of internal Army records and investigative files obtained by Rolling Stone, including dozens of interviews with members of Bravo Company compiled by military investigators, indicates that the dozen infantrymen being portrayed as members of a secretive “kill team” were operating out in the open, in plain view of the rest of the company. Far from being clandestine, as the Pentagon has implied, the murders of civilians were common knowledge among the unit and understood to be illegal by “pretty much the whole platoon,” according to one soldier who complained about them. Staged killings were an open topic of conversation, and at least one soldier from another battalion in the 3,800-man Stryker Brigade participated in attacks on unarmed civilians. “The platoon has a reputation,” a whistle-blower named Pfc. Justin Stoner told the Army Criminal Investigation Command. “They have had a lot of practice staging killings and getting away with it.”