Very sad. Hopefully they followed safety protocols (administering o2).
If he was low on air (after only 25 mins in 60ft???), hopefully he didn't do a pop-up without breathing on ascent, as that could be an AGE. That's also not the best diving conditions, as posted by reefman.
If you're like me, I don't every want to be that type of statistic. We are all guessing, at this point, the "what-if's. Many people forget their basic dive info on ascent rate, the importance of an open-airway, etc. Might be a good time to crack those old dive manuals out and refresh your memory on proper procedures. If you haven't been diving in awhile, remember, refresher courses take 2 hours, and cost around $75, too, which is money well spent, in my opinion.
Condolences to the man's family.