If I serve a subpoena duces tecum, must I also submit a Touhy request?

Yes. If you serve a subpoena for employee testimony, you also must submit a request under United States ex rel. Touhy v. Regan, 340 U.S. 462 (1951)? If you serve a subpoena duces tecum for records in the possession of the Department, you also must submit a Touhy Request.