The U.S. Army has dropped all criminal charges against an officer in connection with the beating deaths of two detainees in Afghanistan in 2002.

An investigating officer has cleared Captain Christopher Beiring of dereliction of duty and making false statements.

Captain Beiring commanded a reserve military police unit stationed at a U.S. detention center in Bagram where the prisoners died. He says his unit did not receive enough training from the Army to properly handle the detainees.

The investigating officer now says Captain Beiring was "sorely challenged at every step" but did the best job he could.

Fourteen servicemen, including military interrogators, have been charged in the case. Captain Beiring was the only officer facing charges. Three members of his unit and some interrogators have either been convicted or pleaded guilty to abuse, assault or other charges.

Some information for this report provided by AP.