Actually, I was there when this picture was taken. The reason you can't see this mans face is because he is a member of an ultra hush-hush tactical operations team. Many of the team members train mall security forces and others, like the men on this deployment, take out Columbian drug lords and conduct black ops all over the globe.
In this picture Operator "X" is executing civilians. He is standing tall for no other reason that he wants a clean shot at the elders heads first, then he goes back and shoots the children. Notice how he's shooting down towards the ground. That's because the civilians were disarmed then bound with flex cuffs and placed on their knees.
Of course this information is confidential, so please don't repeat it.