An intelligence officer on his second tour of duty in Iraq at the time of the Haditha homicides, 1st Lt. Andrew A. Grayson faces three charges related to the incident.

He is accused of dereliction of duty after he allegedly "willfully failed" to ensure that the incident was fully investigated and accurately reported up the chain of command. The charge carries a maximum punishment of six months in jail and discharge from the service.

The 25-year-old also is accused of making a false official statement and obstructing justice, a charge that specifically alleges he wrongfully endeavored to impede an investigation. Each of those charges comes with the possibility of five years' prison time and dismissal from the service.

Grayson joined the service in May 2003 through the Naval Reserve Officer Training Corps.

He is currently assigned to the 2nd Intelligence Battalion, II Marine Expeditionary Force as a human exploitation team commander.