She may be one of the dead, if in fact this is even true... that he had a girlfriend ... see, I saw another post that said the cops were having a hard time IDing him... therefore, it is more possible that he is an outsider, because SOMEone would chip in to tell the police who he was.
Yeah, I thought of that after I posted. She could have been his girlfriend in his mind only (crazy stalker) or the girlfriend angle is a totally bogus rumor.