Were they snorkeling?
Did he open the envelope?
Did he die on natural causes?
its one of those letters that contain a bomb?
Did he read sth written on the envelope?
Maybe the envelope contained an anthrax virus which could have killed him?
Did he touch the envelope?
Did the envelope contain sth which has killed him?
Was it poisoned?
Um was it night?
:lol: well then it was day so he could see where he was going
It was a convertible or an open-air car