 As Natalie tells Stottlemeyer and Disher everything they have learned on the Stipe case thanks to Ambrose, Monk looks inside the cab, and when he next looks out, he declares to all that the cabbie was killed by the same man who desecrated Brandon Lorber.When Stottlemeyer asks him who is responsible, Monk then declares that both crimes were the work of the man who killed Stipe.To prove his point, Monk produces a piece of gum in the backseat of the cab.