Prosecutors from the Naval Criminal Investigative Service are pursuing possible war crimes charges against U.S. Marines for actions in Fallujah, Iraq in 2004.
The charges allege that Marines from Camp Pendleton killed several detained insurgents.
Jose Nazario Jr., 27, faces voluntary manslaughter charges in civilian court and several other Marines are under investigation.
The investigation ensued after Ryan Weemer, a 24-year-old rifleman for the Marine's Kilo Company, mentioned the incident during a polygraph examination for employment with the Secret Service. Weemer described the killings when asked about possible participation in a wrongful death.
The Marines entered a house under insurgent fire and took several captive. Nazario inquired to Weemer if the captives were dead. After responding in the negative, Nazario allegedly stated, "make it happen," the Associated Press quotes.
Kilo Company members face prosecution over similar incidents in Haditha, Iraq, in which Marines allegedly killed several Iraqi civilians.
One other former Marine, Steven Green, faces rape and murder charges in civilian court for a separate incident.
