U.S. Code / Title 18 — Crimes and Criminal… / Part II—Criminal Procedure / Chapter 223—Witnesses and Evidence18 U.S.C. § 3485Section§ 3485. Expert witnesses—(Rule) (June 25, 1948, ch. 645, 62 Stat. 833.) Previous§ 3484. Subpoenas—(Rule)Next§ 3486. Administrative subpoenas