Operation Caesar: at the heart of the Syrian death machine

Never before has such damning evidence of war crimes and crimes against humanity been revealed in the midst of a conflict.

As civil war raged in Syria, we owe the disclosure of this evidence to one man.

He goes under the codename of Caesar. This military police photographer was required to document the murder and torture of thousands of Syrian civilians in the custody of the Assad regime.

Over the course of two years he used a police computer to copy the photos, and in 2013 he risked his life to smuggle out 53,000 photos and documents that show prisoners tortured, starved and burned to death.

He has never appeared in the media. In January 2015, in the American magazine 'Foreign Affairs', President Bashar al-Assad claimed that this military photographer didn't exist.

Garance Le Caisne has spent dozens of hours with him.

This book tells his story.