The depravity of the Assad regime seemingly has no limit. Last month some 55,000 photographs appeared documenting the industrial-scale torture, starvation and execution of thousands of detainees by the regime.

The gruesome photos were leaked by "Caesar," a defector from the Syrian military police. An international team of legal and forensic experts retained by the Qatari government, including a former chief prosecutor of the Special Court for Sierra Leone, concluded that the photos present "clear evidence" of "systematic torture and killing of detained persons by the agents of the Syrian government."

The Wall Street Journal editorial page has now obtained additional photographs that appear to belong to the same batch. The brutality depicted in these photographs is almost beyond description: The corpses of detainees lie atop one another, their emaciated limbs contorted in apparent agony; the bodies invariably show extensive bruising and abrasions; jaws are dislocated; eyes are gouged out.

The opposition Syrian National Movement, which provided the Journal with these images, says they were "transferred and broadcast from inside [the regime] through a complicated process to maintain the security" of sources. The movement adds that the images were "leaked from the areas of Damascus, Syria, and its surrounding countryside" from September 2011 to August 2013.

While it's impossible to independently verify the authenticity of the images, they appear to be consistent with the "Caesar" images: Each body is accompanied by an identification card held up by the photographer or a colleague. As the experts who examined the "Caesar" images noted in their report, "The reason for photographing the executed persons was twofold: First to permit a death certificate to be produced without families requiring to see the body thereby avoiding the authorities having to give a truthful account of their deaths; second to confirm that orders to execute individuals had been carried out."

The first round of Geneva II came to an inconclusive end last week. The Obama administration insists the opposition must sit down with the butcher Assad when talks resume on February 10.