All I know was that his physical and mental health was in a long slow decline during the 90s. The amazing thing was how well they kept it a secret. Around 1990, it was mentioned he went to live on his grandmother's farm for a while.The last time I saw him on the street, late 80s, he looked horrible. He was fat and bloated.In the 1999 Unpaved book, we found out Northern Calloway died. For ten years I was wondering where he went. It wasn't until after the books release details about his mental health, smashing windows, and running around naked came out. The Sesame people did a heck of a job keeping it hushed up.
One of my last memories of David- he did make it to Lou's and Maria's wedding, but they stuck him waaaaaaaaayyyyyy in the back. It was a little sad, for as long as they were on the show, David and Maria were the youngest adults, and they were inseparable. Now Maria is marrying Luis and David got kicked to the curb. Pity.