Prosecution: "We didn't do it."
Defense: "Well, we have a recording of the call, and we sure didn't record it."
Prosecution: "Uhhhh, there was a warning before the call that it would be recorded."
Defense: "Well, on the recording, no such warning exists..."
Prosecution: "Ohhhh, that recording... Ummm, yeah, that was an intern, and they stopped listening as soon as they realized it was wrong. Pinky promise."