Mr. Monk and the Really, Really Dead Guy - S5-E15
Factual error: The FBI agent runs a computer check and prints out a list of all the pet stores in San Francisco selling ferrets. But he shouldn't have been able to generate any list at all. Pet ferrets are illegal in the state of California, and are not sold in pet stores there. (00:15:00)
Mr. Monk and the Really, Really Dead Guy - S5-E15
Factual error: In real life, the FBI does not have jurisdiction over routine homicide cases, which are almost always left to the local police. They have no jurisdiction over serial murder at all, unless a federal employee is a victim or one of the murders gets committed on federal property (like an army base, federal prison or national park, or on sovereign territory like a reservation). The only time the FBI would be involved in a homicide is if the individual crossed state lines in committing the crime.
Mr. Monk and the Really, Really Dead Guy - S5-E15
Factual error: Monk typing the address into his laptop would not affect the trace the agents are doing, it definitely wouldn't pop up on the agent's screen as the result of the trace.
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