DO NOT READ IF YOU HAVE NOT PLAYED THE GAME, THIS CONTAINS SPOILERS AND STUFF
my interpretation.
The man in question has died in a car accident along with paul jacobsen and mr.donnely. (esther may have died, maybe not)
how i assume this, the car accident is referenced many times in the story.
there are four wrecked ships in the entire story (mid first chapter, beginning second chapter, end second chapter, very last chapter)
each one represents how each of the four characters got to the island.
also recognize that there are three houses in which the three characters, before he had gotten to the island, had made their home before their assent to heaven.
the island he is on is his assent to heaven (his climbing to the top of the mountain to the radio tower)
lets hear your guys' opinions