For investigative purposes, the Government itself is exempt, per the DMCA, 17 U.S Code § 1201:
"(e)Law Enforcement, Intelligence, and Other Government Activities
"This section does not prohibit any lawfully authorized investigative, protective, information security, or intelligence activity of an officer, agent, or employee of the United States, a State, or a political subdivision of a State, or a person acting pursuant to a contract with the United States, a State, or a political subdivision of a State. "