Why was dag hammarskjold's body intact and everyone else's burned after his plane crashed?

The proof that the Dag Hammarskjold's body intact and everyone else's burned after his plane crashed is still missing. There was a hole in his forehead that is said to be brushed in photos but it is still a mystery that how he died.

Explanation:

Dag Hammarskjold was UN Secretary General and as well as Swedish economist and diplomat.He died during in a plane crash when he was on a mission to prevent the escalation in Congo.It is said that the plan was shot by another plan and a noise was heard before the plan was crashed on the ground.He is the only Noble Peace Prize Winner who got his prize after the death.

Whatever you believe