Mr. Monk and the Class Reunion - S5-E6
Factual error: Stottlemeyer says that if Diane killed herself, her suicide note would go on the public record (and her old nurse would recognize it as a copy of her decades-old note). Since when are suicide notes made public?
Answer: The two men are trying to work out a secret deal between them without involving the union, which means the workers' interests aren't being represented and defeats the whole purpose of a union. The mayor would lose labor's support and Cusack's union troubles would just be starting.
Captain Defenestrator