Baghdad, Iraq ? A U.S. Army investigator has recommended that four American soldiers accused of raping a a 14-year-old girl and of killing her and her family face a court-martial, a lawyer in the case confirmed on Monday.

Col. Dwight Warren, the investigator in the case, said in a report issued Sunday that “reasonable grounds exist to believe that each of the accused committed the offense for which he is charged.”

The four soldiers of the 101st Airborne Division are charged with raping Abeer Qassim al-Janabi in her family’s home in Mahmoudiya, about 20 miles south of Baghdad, then killing her along with her parents and her younger sister. Military prosecutors say the four set the teenager’s body on fire to hide their crime.

The soldiers accused of rape and murder – Spc. James P. Barker, Sgt. Paul E. Cortez, Pfc. Jesse V. Spielman and Pfc. Bryan L. Howard – could potentially face the death penalty. Another soldier, Sgt. Anthony W. Yribe, is accused of failing to report the attack but is not alleged to have been a direct participant.

Another soldier who was said to have allegedly planned the attack, Pfc. Steven D. Green, was discharged from the army because of a “personality disorder” before the allegations became known.

He was arrested in June shortly after the allegations became known. He has pleaded not guilty to rape and murder charges and is being held in a civilian court in the United States.