In March or April 2007, three noncommissioned United States Army officers, including a first sergeant, a platoon sergeant and a senior medic, killed four Iraqi prisoners with pistol shots to the head as the men stood handcuffed and blindfolded beside a Baghdad canal, two of the soldiers said in sworn statements.

After the killings, the first sergeant  the senior noncommissioned officer of his Army company  told the other two to remove the men’s bloody blindfolds and plastic handcuffs, according to the statements made to Army investigators, which were obtained by The New York Times.

The statements and other court documents were provided by a person close to one of the soldiers in the unit who insisted on anonymity and who has an interest in the outcome of the legal proceedings.

After removing the blindfolds and handcuffs, the three soldiers shoved the four bodies into the canal, rejoined other members of their unit waiting in nearby vehicles and drove back to their combat outpost in southwest Baghdad, the statements said.