MummificationJust as the rest of the bodies on Mount Everest, extreme cold allowed for Sharp to be perfectly preserved.
He died as a result of a combination of faulty equipment, poor conditions, and to exposure. Soon after he achieved the summit, Sharp began his decent (the most dangerous part of the climb), where he was forced to traverse the mountain with a broken head lamp and a frozen oxygen supply. Added to exhaustion ended being fatal.
Sir Edmond Hillary, the first man to make the summit, spoke with outrage about Sharp being left to die while other climbers pushed on to the summit..."he was a human being! We would regard it as our duty to get him back to safety."
David Sharp's body, just like the Green Boots body, is also used as a marker or a checkpoint for other climbers.