I am sorry to hear about your friend and supervisor. The Dr. Could be right but there is such a thing called sudden death by epilepsy(sudep). There is quite a bit of information on it on the internet. I am no Dr. And without an autopsy it is difficult to say. If you check under this forum of epilepsy their is a gentleman that lost his wife with this, I believe his name is bethasbob(sp, or something like that) he gives a little information on this but I feel that his wife was on too much medication(just my opinion).
I also feel that we all die of natural causes, just like in the olden days, our heart gets tired and it stops, of course this is just my opinion.
My thoughts and prayers are with you!
God bless!
Sincerely,
sandy