Sec. 74. No motion to quash, plea in abatement or other dilatory plea to the indictment, shall be received by any court unless the party offering such plea shall prove the truth thereof by affidavit, or by some other sworn evidence.
Mich. Comp. Laws § 767.74, under THE CODE OF CRIMINAL PROCEDURE.
Mich. Comp. Laws § 767.74
Sec. 74. No motion to quash, plea in abatement or other dilatory plea to the indictment, shall be received by any court unless the party offering such plea shall prove the truth thereof by affidavit, or by some other sworn evidence.