Quote from Lieutenant Disher in Mr. Monk and the Three Julies
Lieutenant Disher: [over radio] He's never gonna buy this. Adrian Monk: Dr. Kroger thinks he will. Matthew Teeger has suffered a pure psychotic break. He's in complete denial. His mother never died. Not to him. Captain Stottlemeyer: The important thing is that we keep him talking. Lieutenant Disher: What if he has a knife? Captain Stottlemeyer: He's right. We need a code, a phrase, in case he's in trouble. Lieutenant Disher: How about, "Mother of God, he has a knife!"?