Which of the following is true about electronic surveillance? Select all that apply.

Police must obtain a warrant to monitor telephone calls.
Police may place surveillance devices on suspected criminals’ phones
Police can plant viruses on smart phones of suspected drug runners.
Private citizens can monitor other people’s telephone calls.
Private citizens can record their own telephone calls in most states.

- Police must obtain a warrant to monitor telephone calls.

- Police may place surveillance devices on suspected criminals’ phones.
- Private citizens can record their own telephone calls in most states.