A former Syrian military official convicted of torturing prisoners during the rule of former President Bashar Assad was sentenced Thursday to 60 years in a U.S. prison after a federal judge recounted the "unimaginably cruel" details of his abuse.

A jury in March found Samir Ousman Alsheikh guilty on all six counts including torture and conspiracy to commit torture for his actions while in charge of Syria's infamous Adra Prison from roughly 2005 to 2008.