Sad news. I know that many on the board will disagree but if the 14 year old was at 90 ft then that is a deeper than I would want a 14 year old of mine to be at. Not so much the physiology but the consistent judgement and risk appreciation of that age group.
It said the weight pocket was at 94 feet of sea water. It does not say the diver was diving at 94 feet of sea water. The pocket could have been dropped while trying to take the weights out with the diver at the surface, or the diver could have sunk to a greater depth at some point during or after the incident.