hey this is a good Question

He might have died in the accident <-- after giving careful thoughts
this could implie he could be dead or alive

but also i think it depends on the situation

like for example, other info was given such as luckly his friend, who is a doctor was beside him or he might have died in the accident.
then in this situation he is still alive.

oh yeah by the way tdol you sure post really good polls
that can make me think hee hee :D