It is not competent, in any case, for any party to the cause who has been examined therein as a witness, to corroborate his testimony when impeached by proof of his own declaration or statement made to third persons out of the presence and hearing of the adverse party.
§ 9-117
Md. Code, Courts and Judicial Proceedings § 9-117, under Article — Courts and Judicial Proceedings.
Md. Code, Courts and Judicial Proceedings § 9-117