A U.S. soldier has been found not guilty by reason of lack of mental responsibility in the killing of a Hungarian civilian contractor in Iraq, military officials said Saturday.

Pfc. Carl T. Stovall had pleaded not guilty in the March 2009 shooting of Hungarian laborer Tibor Bogdan near Camp Taji, just north of Baghdad. Bogdan was shot while digging a hole at the camp.

The shooting came less than a month into Stovall's third deployment to the Middle East.

He opted to be tried by a military judge at Fort Hood instead of a jury. Testimony was heard this past week.

In a statement Saturday, officials with the military post said the court ordered Stovall to receive a psychiatric/psychological evaluation before a post-trial hearing is conducted on Nov. 10. Stovall faced a maximum sentence of life without the possibility of parole.

Stovall had allegedly once told investigators he believed Bogdan, who worked for a contractor specializing in trash and waste removal, was a terrorist planting a roadside bomb. Prosecutors, however, said Stovall, now 28, has changed his story multiple times, allegedly denying any involvement in one version.