That could be coincidental, although
It should matter if it's the same person or not.
If you smack your head on solid concrete from that high of a drop chances are you are going to die right on impact. Now if you were to put a gun under your chin and pull the trigger there is a high chance you may still live from it.
That was a clean split wound, solid concrete would just collapse the face. He may have hit the edge of a concrete wall but concrete isn't sharp like a piece of metal.