Yes, I could see someone trying to hold their breath and becoming unconscious before they are able to surface, however the urge to breath usually becomes overbe

Yes, I could see someone trying to hold their breath and becoming unconscious before they are able to surface, however the urge to breath usually becomes overbearing for me long before I would become unconscious. It's just an interesting situation to think about, because how would you know? And, why wouldn't someone come up? Obviously he became unconscious at some point, but was it due to not being able to breathe? Or did something else happen to him as he was entering the water (eg. aneuyrsm, heart failure, etc). It's hard to believe it could have been an intentional act of the kid (suicide at 6? probably not very common) or that he would go into that part of the pool in the way you described without knowing how to swim.