Warning: This report contains descriptions and an image that could disturb some readers.
The savage and protracted conflict in Syria has left more than 170,000 dead. Now, there are allegations of torture and killing of political prisoners opposed to the regime of Syrian President Bashar Assad.
Those allegations appear to be supported by evidence: tens of thousands of photographs.
The man who says he took the pictures worked as a military police photographer for the Assad regime and defected last year.