Very sad news. Reggie suffered from sleep aphnia. I'm not sure that is the correct spelling but a while back I saw a piece on ESPN's OTL which talked about this being a chronic disorder that affects several lineman after they are done playing. It s very dangerous and probably was a major contributing factor in his death.
In the 80's and 90's I got to see two guys who I thought were the most feared and respected on the field. One was LT, my favorite player ever, but he had problems off the field. The other was Reggie and he was a true humanitarian. The world lost a great man not just a great football player. Go in peace Reggie.