CNN) -- A former Marine sergeant accused of killing two Iraqi captives in a 2004 battle in Iraq said his squad fabricated the entire story. Jose Luis Nazario has pleaded not guilty to voluntary manslaughter charges brought by federal prosecutors in southern California. He left the service in 2005. According to an affidavit from a Navy investigator, Nazario killed one prisoner and then asked his squad: "Who else wants to kill these guys? Because I don't want to do it all myself." The prisoners -- four men who had been captured in a house that was the source of hostile...