IL · rules
Ill. R. Evid. 702
Testimony by Experts
If scientific, technical, or other specialized knowledge will assist the trier of fact to understand
the evidence or to determine a fact in issue, a witness qualified as an expert by knowledge, skill,
experience, training, or education, may testify thereto in the form of an opinion or otherwise.
Where an expert witness testifies to an opinion based on a new or novel scientific methodology or
principle, the proponent of the opinion has the burden of showing the methodology or scientific
principle on which the opinion is based is sufficiently established to have gained general
acceptance in the particular field in which it belongs.
History
Adopted September 27, 2010, eff. January 1, 2011. Comment Rule 702 confirms that Illinois is a Frye state. The second sentence of the rule enunciates the core principles of the Frye test for admissibility of scientific evidence as set forth in Donaldson v. Central Illinois Public Service Co., 199 Ill.2d 63, 767 N.E.2d 314 (2002).
Provenance
- Source
- illinoiscourts.gov
- Retrieved
- 2026-09-14
- Edition
- 2026-09-14
- Content hash
94d0bc7e779974a267e7275ffeba07395fc99fa34164c39db0f4c9bf0bfce02c
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