Why doesn't the naval officer seem more shocked at the death of the two children?

When the naval officer arrives on the island in the book
The Lord of the Flies,  he sees the boys and sees that Jack and his group are dressed in
war paint and barely clothes.  Ralph is crying and on the ground.  He has no idea that
the scene is almost Ralph's death at the hands of Jack and his
hunters.

The naval officer probably believes that the boys
were playing in the forest and around the island some adventure game.  He has no way of
knowing that Roger had shoved Piggy off the rocks with a boulder or that Simon had been
attacked and continuously savagely kicked and beaten.  Remember, both Piggy and Simon's
body were washed out to sea.