D.C. Code § 16-4702
Except as provided in section 16-4703 , no judicial, legislative, administrative, or other body with the power to issue a subpoena shall compel any person who is or has been employed by the news media in a news gathering or news disseminating capacity to disclose:
(2) Any news or information procured by the person while employed by the news media in the course of pursuing professional activities that is not itself communicated in the news media, including any:
Sept. 26, 1992, D.C. Law 9-156, § 2, 39 DCR 5682
July 25, 1995, D.C. Law 11-30, § 4, 42 DCR 1547
1981 Ed., § 16-4702.