405 ILCS 10/4
Whenever the executive authority of any state demands of the executive authority of this state, any fugitive within the purview of section 3 and produces a copy of the commitment, judgment or other judicial process and proceedings, certified as authentic by the Governor or chief magistrate of the state whence the person so charged has fled, with an affidavit made before a proper officer showing the person to be such a fugitive, it shall be the duty of the executive authority of this state to cause him to be apprehended and secured, if found in this state, and to cause immediate notice of the apprehension to be given to the executive authority making such demand, or to the agent of such authority appointed to receive the fugitive, and to cause the fugitive to be delivered to such agent when he shall appear. If no such agent appears within 30 days from the time of the apprehension, the fugitive may be discharged. All costs and expenses incurred in the apprehending, securing, maintaining and transmitting such fugitive to the state making such demand, shall be paid by such state. Any agent so appointed who receives the fugitive into his custody shall be empowered to transmit him to the state from which he has fled. The executive authority of this state is hereby vested with the power, on the application of any person interested, to demand the return to this state of any fugitive within the purview of this Act.
405 ILCS 10/4