I. Any person or persons summoned having custody or control of the child who, without reasonable cause, fails to appear, may be proceeded against for contempt of court.
II. In case the summons cannot be served, or the parties served fail to appear, or in the case when it appears to the court that service will be ineffectual, or that the best interest of the child requires that he be brought forthwith into the custody of the court, a warrant may be issued for the child's appearance against anyone having custody or control of the child.