Graphically detailed story by C J Chivers in the New York Times . The group responsible is under the umbrella of the Western-backed Syrian opposition.
Matthew Schrier was helpless. An American photographer held in a rebel-controlled prison in the Syrian city of Aleppo, he and a fellow prisoner had been caught trying to gouge a hole in their cell’s wooden door. The captors took his cellmate, he said, beat him, and brought him back with blood-streaked ankles and feet. Now was Mr. Schrier’s turn.
Obama Officials Weigh Response to Syria Assault (August 23, 2013)
Images of Death in Syria, but No Proof of Chemical Attack (August 22, 2013)
General Says Syrian Rebels Aren’t Ready to Take Power (August 22, 2013)
Mr. Schrier was held for seven months by jihadi rebels. Now was Mr. Schrier’s turn