Section 2
SEC. 2. When two or more persons are charged with the commission of a certain crime, the competent court, at' any time before they have entered upon their defense, may direct any of them to be discharged, that he may be a witness for the Government when in the judgment of the court: (a) There is absolute necessity for the testimony of the accused whose discharge is requested; (b) There is no other direct evidence available for the proper prosecution of the crime committed, except the testimony of said accused; (c)The testimony of said accused can be substantially corroborated in its material points; (d) Said accused does not appear to be the most guilty, and (e) Said accused has not at any time been convicted of the crime of perjury or false testimony or of any other crime involving moral turpitude.