His grave said 9/22/04. That's the day of the crash, and well, he obviously did not die that day. But since that's the date they put on the grave they must be telling the public he died in the crash. Which means he's not one of the 6 that came back alive.
I'm guessing he either died on the island (which will happen later in the series?), or he's being held their like the rest of them.
On another note, they say someone will die next week. People are saying it could be Micheal saving someone elses life and redeeming himself.