How can the district attorney's office subpoena phone records?

The district attorney's office can subpoena phone records by issuing a legal document known as a subpoena duces tecum, which compels the phone service provider to produce specific records. This process typically requires demonstrating to a court that the records are relevant to an ongoing investigation or legal proceeding. The subpoena must comply with legal standards and privacy laws, ensuring that the request is justified and reasonable. Once issued, the service provider is legally obligated to comply unless they successfully challenge the subpoena in court.