A legal question

"A man died late last night after being shot and run over.

Philadelphia Police say the yet-to-be-identified man was shot multiple times along the 4500 block of Morris Street -- near where Route 1 crosses through Fernhill Park -- in the city’s Germantown neighborhood around 10 p.m.

The victim managed to stumble down the street despite being shot twice in the back and once in the wrist, according to investigators. He eventually collapsed in the street.

A passing driver didn’t see the man passed out and wound up running over the man.

Police rushed the shooting victim to Temple University Hospital where he died from his wounds.

The driver who struck the shooting victim stopped and wasn’t charged, police said."

The above story was just reported and is true.  My question is this:  since the victim did not die of his bullet wounds would he be guilty of murder?  I would think not since he did not actually kill the man.
Some may feel he is guilty of some degree of murder since his actions (shooting the man twice) lead to the mans eventual death and he should have known that his actions of shooting the man and leaving him without calling for help would likely lead to the mans death. 

All of this is academic if investigators determine that the man who ran the victim over is also the shooter.