Penal Code 632 does not apply to eavesdropping by law enforcement personnel. Police can legally listen in on private conversations without the consent of the parties. In addition, any evidence police obtain this way is admissible in court. Note too that private citizens can get around the law against eavesdropping if they record a conversation in order to gather evidence about certain kinds of crimes. This exception applies if: the person doing the recording is one of the parties to the conversation, and that person is recording the conversation in order to gather evidence that they reasonably believe is related to the commission, by the other party to the conversation, of one of the following crimes: a. extortion, b. kidnapping, c. bribery, or d. any felony involving violence against another person (such as murder or rape).