I received the account below from a Marine who witnessed George being wounded but don't
remember who gave it.

He was killed while clearing a booby-trapped road block.  
Apparently no one knew he was injured at first.  He helped with three
men of the 7th Engineers who had been wounded.  He had a
medi-vac called for him when he fell down and started having
trouble breathing.  He was given mouth-to-mouth and it was
discovered that he had a head wound. He seemed to be doing better
by the time the medi-vac arrived but died later at the hospital."