The Department of Defense announced today it has changed the status of Chief Warrant Officer Patrick Dorff, 32, of Minnesota from duty status whereabouts unknown to killed in action.

Dorff,s helicopter went down in the Tigris River during a search on Jan. 25 after four soldiers, watercraft capsized. On Jan. 29, his remains were recovered.

Dorff was assigned to the 1st Battalion, 10th Aviation (Fort Drum); however, in support of mission requirements, he was attached to the 3rd Squadron, 17th Cavalry, 10th Mountain Division, Fort Drum, N.Y.

The incident is under investigation.