Del. Code tit. 10, § 4322

A reporter is privileged in an adjudicative proceeding to decline to testify concerning the source or content of information that he or she obtained within the scope of his or her professional activities if the reporter states under oath that the disclosure of the information would violate an express or implied understanding with the source under which the information was originally obtained or would substantially hinder the reporter in the maintenance of existing source relationships or the development of new source relationships.