Reported by his son, Mark, on Instagram:
The one time I met him at a convention he was having a wonderful time telling stories about any and everything. Delightful man. He'll be missed.realmarksheppard
We went to spend some time with my father today. Though he couldn't speak, we held hands, he laughed and was so happy to see us. We left and came home. A good day. He was rushed to hospital and passed at 6:30pm, my mother by his side. I am so grateful that he didn't have to suffer any longer. Thank you for all your kind thoughts, love and prayers.