In People v. Tebo, 37 Mich App 141; 194 NW2d 517 (1971), the defendant made a telephone call from jail after he had been booked. One of the police officers testified that he picked up the extension to ascertain whom the defendant was calling. Id. at 144-145. On appeal, the Court held that the defendant's telephone conversation had been improperly intercepted because there was "nothing in the record which indicates that the defendant should have known someone was listening in." Id. at 149.