Confession of crime

(1) An admission at any time by a person charged with the commission of any crime or offence which states, or suggests the 52 inference, that he committed the crime or offence may be admitted in evidence against him as to the facts stated or suggested, if such admission was freely and voluntarily made. (2) Before such admission is received in evidence the prosecution must prove affirmatively to the satisfaction of the judge that it was not induced by any promise of favour or advantage or by use of fear, threat or pressure by or on behalf of a person in authority.