Defendant as Witness

A defendant in a criminal action or proceeding cannot be compelled to be a witness against himself but if he offers himself as a witness he may be cross- examined by the prosecuting attorney and the attorney for any codefendant as to all matters about which he was examined in chief. His neglect or refusal to be a witness cannot in any manner prejudice him nor be used against him at the trial or proceeding by the prosecuting attorney.