Because he suffered "massive head injuries" chances are good that he wasn't wearing a helmet. Doubtful if I would have been wearing a helmet on that route either.
Should a "hiker" be climbing the C-D route at this time of year? (or any time?) How did he end up on the mountain with no experience?
Be careful who you climb with, know your limits, and don't think that turning back short of the summit makes you any less of a person. It may keep you alive.