I haven't been able to find any other news, but I went on an overnight hike this weekend and came across the ambulance on the trail just after noon on Saturday, between Reno Monument Road and Rocky Run Shelter. I later encountered two southbounders who had been first on the scene, other than the man's companion, and had attempted to revive him by CPR, but to no avail. Neither could the EMT's revive him.
My condolences to his friends and family.