Three US marines accused of murder and four of covering up the Iraqi civilian deaths.
Cruz was testifying in a preliminary hearing on Wednesday into charges against Captain Randy Stone, who is accused of failing in his duty to investigate and report the 24 deaths.
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Cruz said he also pumped bullets into the five dead men before Wuterich shot them again in the torso and head, and told him to blame the Iraqi army.
“I just held my weapon up and shot them. I know they’re dead, but I wanted to make sure they were dead,” he told the hearing.