admissibility in evidence of testimony as to statements voluntarily made to officers or employees in the course of their official duties

admissibility in evidence of testimony as to statements voluntarily made to officers or employees in the course of their official duties Sec. 348. (a) It shall be lawful and admissible as evidence in any proceedings founded under this title, or any of the penal or criminal provisions of any law relating to immigration, naturalization, or citizenship, for any officer or employee of the United States to render testimony as to any statement voluntarily made to such officer or employee in the course of the performance of the official duties of such officer or employee by any defendant at the time or subsequent to the alleged commission of any crime or offense which may tend to show that such defendant did not have or could not have had knowledge of any matter concerning which such defendant is shown to have made affidavit, or oath, or to have been a witness pursuant to such law or laws. (b) In case any clerk of court shall refuse or neglect to comply with any of the provisions of section 339 (a), (b), or (c), such clerk of court shall forfeit and pay to the United States the sum of $25 in each and every case in which such violation or omission occurs and the amount of such forfeiture may be recovered by the United States in a civil action against such clerk. (c) If any clerk of court shall fail to return to the Service or properly account for any certificate of naturalization furnished by the Service as provided in subsection (d) of section 339, such clerk of court shall be liable to the United States in the sum of $50, to be recovered in a civil action, for each and every such certificate not properly accounted for or returned.