Illinois Compiled Statutes

725 ILCS 5/115-15 (2026)

Laboratory reports

✓ current as of May 2026
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(725 ILCS 5/115-15)
    Sec. 115-15. Laboratory reports.
    (a) In any criminal prosecution for a violation of the Cannabis Control Act, the Illinois Controlled Substances Act, or the Methamphetamine Control and Community Protection Act, a laboratory report from the Illinois State Police, Division of Forensic Services, that is signed and sworn to by the person performing an analysis and that states (1) that the substance that is the basis of the alleged violation has been weighed and analyzed, and (2) the person's findings as to the contents, weight and identity of the substance, and (3) that it contains any amount of a controlled substance or cannabis is prima facie evidence of the contents, identity and weight of the substance. Attached to the report shall be a copy of a notarized statement by the signer of the report giving the name of the signer and stating (i) that he or she is an employee of the Illinois State Police, Division of Forensic Services, (ii) the name and location of the laboratory where the analysis was performed, (iii) that performing the analysis is a part of his or her regular duties, and (iv) that the signer is qualified by education, training and experience to perform the analysis. The signer shall also allege that scientifically accepted tests were performed with due caution and that the evidence was handled in accordance with established and accepted procedures while in the custody of the laboratory.
    (a-5) In any criminal prosecution for reckless homicide under Section 9-3 of the Criminal Code of 1961 or the Criminal Code of 2012, or driving under the influence of alcohol, other drug, or combination of both, in violation of Section 11-501 of the Illinois Vehicle Code or in any civil action held under a statutory summary suspension or revocation hearing under Section 2-118.1 of the Illinois Vehicle Code, a laboratory report from the Illinois State Police, Division of Forensic Services, that is signed and sworn to by the person performing an analysis, and that states that the sample of blood, other bodily substance, or urine was tested for alcohol or drugs, and contains the person's findings as to the presence and amount of alcohol or drugs and type of drug is prima facie evidence of the presence, content, and amount of the alcohol or drugs analyzed in the blood, other bodily substance, or urine. Attached to the report must be a copy of a notarized statement by the signer of the report giving the name of the signer and stating (1) that he or she is an employee of the Illinois State Police, Division of Forensic Services, (2) the name and location of the laboratory where the analysis was performed, (3) that performing the analysis is a part of his or her regular duties, (4) that the signer is qualified by education, training, and experience to perform the analysis, and (5) that scientifically accepted tests were performed with due caution and that the evidence was handled in accordance with established and accepted procedures while in the custody of the laboratory.
    (b) The State's Attorney shall serve a copy of the report on the attorney of record for the accused, or on the accused if he or she has no attorney, before any proceeding in which the report is to be used against the accused other than at a preliminary hearing or grand jury hearing when the report may be used without having been previously served upon the accused.
    (c) The report shall not be prima facie evidence if the accused or his or her attorney demands the testimony of the person signing the report by serving the demand upon the State's Attorney within 7 days from the accused or his or her attorney's receipt of the report.
(Source: P.A. 102-538, eff. 8-20-21.)

    
Notes of Decisions
Cited in 14 cases (3 in the last 5 years), 1998–2024 · leading case: People v. McClanahan, 729 N.E.2d 470 (Ill. 2000).
People v. McClanahan, 729 N.E.2d 470 (Ill. 2000). · cites it 6× “Justice RATHJE delivered the opinion of the court: At issue in this appeal is the constitutionality of section 115-15 of the Code of Criminal Procedure of 1963 (725 ILCS 5/115-15 (West 1998)). This section allows the State, in prosecutions under the Cannabis Control Act (720…”
People v. Avant, 771 N.E.2d 420 (Ill. App. Ct. 2002). · cites it 2× “Defendant appeals, arguing that (1) the trial court erred by denying his motion to suppress evidence because the evidence was obtained during an illegal seizure, and (2) his conviction should be reversed because it was based, in part, on a police laboratory report (hereinafter…”
People v. Phillips, 759 N.E.2d 946 (Ill. App. Ct. 2001). · cites it 2× “Section 115-15(c) of the Code of Criminal Procedure of 1963 (Code) (725 ILCS 5/115-15 (West 1998)) provides that a state police lab report with a supporting affidavit is considered prima facie evidence of the contents, identity, and weight of the substance being analyzed in…”
People v. Brindley, 2017 IL App (5th) 160189 (Ill. App. Ct. 2017). “¶ 18 In Truitt, the State intended to use laboratory reports to prove the content, identity, and weight of a controlled substance pursuant to section 115-15 of the Code of Criminal Procedure of 1963 (725 ILCS 5/115-15 (West 1994)), which allowed the State, with certain…”
People v. McClanahan, 703 N.E.2d 127 (Ill. App. Ct. 1998). · cites it 2× “(c) The report shall not be prima facie evidence of the contents, identity, and weight of the substance if the accused or his or her attorney demands the testimony of the person signing the report by serving the demand upon the State's Attorney within 7 days from the accused or…”
People v. Currie, 2022 IL App (4th) 210598 (Ill. App. Ct. 2022). “¶ 47 In Truitt, prior to trial, the State announced its intention to introduce a chemist’s written laboratory report in lieu of presenting the chemist’s live testimony, pursuant to section 115-15 of the Code (725 ILCS 5/115-15 (West 1994)). Truitt, 175 Ill.”
People v. Brindley, 2017 IL App (5th) 160189 (Ill. App. Ct. 2017). “¶ 18 In Truitt, the State intended to use laboratory reports to prove the content, identity, and weight of a controlled substance pursuant to section 115-15 of the Code of Criminal Procedure of 1963 (725 ILCS 5/115-15 (West 1994)), which allowed the State, with certain…”
Camco v. Lowery (Ill. App. Ct. 2005). · cites it 4× “Section 115-15(a) of the Code of Criminal Procedure of 1963 (Code) (725 ILCS 5/115-15(a) (West 2004)) provides an exception to the hearsay rule for lab reports involving any criminal prosecution for a violation of the Cannabis Control Act (720 ILCS 550/1 et.”
In Re Kef, 922 N.E.2d 322 (Ill. 2009). “In Truitt, the State had attempted to prove up its controlled substance case by recourse to section 115-15 of the Code (725 ILCS 5/115-15 (West 1994) (allowing the State, with certain procedural requisites, to establish lab results solely by means of a lab report, without live…”
People v. Avery (Ill. App. Ct. 2001). · cites it 2× “Issue Defendant first argues that under the supreme court's recent decision in McClanahan , this court must reverse his possession of a controlled substance conviction because he was denied his constitutional right to confront a key prosecution witness when the trial court…”
People v. Avant Modified on Denial of Rehearing replaces opinion filed June 20, 2001 (Ill. App. Ct. 2002). · cites it 2× “appeals, arguing that (1) the trial court erred by denying his motion to suppress evidence because the evidence was obtained during an illegal seizure, and (2) his conviction should be reversed because it was based, in part, on a police laboratory report (hereinafter lab report)…”
People v. O'Daniell, 2024 IL App (5th) 230084 (Ill. App. Ct. 2024). “In Truitt, the State intended to use laboratory reports to prove the content, identity, and weight of a controlled substance pursuant to section 115-15 of the Code of Criminal Procedure of 1963 (725 ILCS 5/115-15 (West 1994)), which allowed the State, with certain procedural…”
— 725 ILCS 5/115-15(a) — 1 case
Camco v. Lowery (Ill. App. Ct. 2005). “Section 115-15(a) of the Code of Criminal Procedure of 1963 (Code) (725 ILCS 5/115-15(a) (West 2004)) provides an exception to the hearsay rule for lab reports involving any criminal prosecution for a violation of the Cannabis Control Act (720 ILCS 550/1 et.”
— 725 ILCS 5/115-15(c) — 3 cases
People v. McClanahan, 729 N.E.2d 470 (Ill. 2000). “Justice RATHJE delivered the opinion of the court: At issue in this appeal is the constitutionality of section 115-15 of the Code of Criminal Procedure of 1963 (725 ILCS 5/115-15 (West 1998)). This section allows the State, in prosecutions under the Cannabis Control Act (720…”
People v. Phillips, 759 N.E.2d 946 (Ill. App. Ct. 2001). “Section 115-15(c) of the Code of Criminal Procedure of 1963 (Code) (725 ILCS 5/115-15 (West 1998)) provides that a state police lab report with a supporting affidavit is considered prima facie evidence of the contents, identity, and weight of the substance being analyzed in…”
People v. McClanahan, 703 N.E.2d 127 (Ill. App. Ct. 1998). “(c) The report shall not be prima facie evidence of the contents, identity, and weight of the substance if the accused or his or her attorney demands the testimony of the person signing the report by serving the demand upon the State's Attorney within 7 days from the accused or…”
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