onairb said:
When Northern Calloway died under rather bizarre and tragic circumstances in the late '80s, the wrote out 'David' by saying he'd moved to his grandmother's farm.
In the book "Street Gang", it was mentioned that Calloway was fired from the show due to his continual bizarre behavior, which included sexual harassment of another female cast member, later to die in a mental hospital of a heart condition brought on by his mental illness. However, in the "Sesame Street Unpaved" (1999) and 40th anniversary (2009) books, it was said that Calloway died of stomach cancer, if as if Sesame Workshop was embarrassed of how Calloway actually left the show and died.