I doubt its fake. Shadows are wrong all over the place, the pic was probably taken under a tree. His face is not "more sharp", the arm is not sticking straight out of the ground. Sheesh..
There is software available that will scan a picture to detect evidence of forgery. Go find one, and run this pic through it. Then we'll talk.
Someone already did, it’s just one of a load of faked pictures.
http://www.freerepublic.com/focus/f-chat/2457090/posts