The report of Dave's death I received was apparently mistaken. I had been told by someone who had worked with Dave in recent years that Dave had passed away earlier today, but this seems not to be the case. He is currently in a hospice where he is being cared for at this time.
I am both glad to hear that Dave is not dead, as I was led to believe, and rather mortified at my having posted this information before it had been confirmed by a second source. I had no reason to doubt my original source, given his close proximity to Dave, but apparently I should have.
My apologies to everyone to whom my post has caused distress. I can't begin to describe how embarrassed I feel right now, particularly since I should have known better.