520 ILCS 5/1.21
Whenever any authorized employee of the Department, sheriff, deputy sheriff or other peace officer of the State shall have reason to believe that any person, commercial institution, commission house, restaurant or cafe keeper, has in his or her, or its possession any wild birds or any part thereof (their nests or eggs), or wild mammals or any part thereof, contrary to the provisions of this Act, including administrative rules, he may file, or cause to be filed, his sworn complaint to such effect, before the Circuit Court and procure a search warrant and execute the same. Upon the execution of such search warrant, the officer executing same shall make due return thereof to the court issuing the same, together with an inventory of all the wild birds or any part thereof (their nests or eggs), or wild mammals or any part thereof, taken thereunder. The court shall thereupon issue process against the party owning, controlling or transporting the wild birds or any part thereof (their nests or eggs), or wild mammals or any part thereof, seized, and upon the return thereof it shall proceed to determine whether or not the same were held, possessed, or transported in violation of this Act, including administrative rules, and in case of a finding to the effect that the same were illegally held, possessed, transported or sold, a judgment shall be entered against the owner or party found in possession of the same for the costs of the proceeding and providing for the disposition of the property seized, as provided for by the terms hereof.
520 ILCS 5/1.21