1041. Presumption of validity of deposition
A written statement or deposition of a witness, purporting to have been tendered or taken before a magistrate on the investigation of a criminal charge and to be signed by the witness and the magistrate, or the copy or record of evidence duly certified as required by law, returned to and produced from the custody of the proper officer, shall be presumed prima facie to have been signed by the witness or to contain the evidence given by the witness at the preliminary inquiry, as the case may be.