Section 720 ILCS 5/33-5 - Preservation of evidence(a) It is unlawful for a law enforcement agency or an agent acting on behalf of the law enforcement agency to intentionally fail to comply with the provisions of subsection (a) of Section 116-4 of the Code of Criminal Procedure of 1963.(b) Sentence. A person who violates this Section is guilty of a Class 4 felony.(c) For purposes of this Section, "law enforcement agency" has the meaning ascribed to it in subsection (e) of Section 116-4 of the Code of Criminal Procedure of 1963. P.A. 91-871, eff. 1/1/2001; 92-459, eff. 8/22/2001.