Admissibility · Illinois

Illinois: Frye — general acceptance

Illinois follows Frye for novel scientific evidence and has expressly declined to adopt Daubert; Illinois Rule of Evidence 702 governs qualification and helpfulness.

What this means for an expert retained in Illinois

Build the expert's file to the standard above from the day of retention: the method's literature and acceptance record, the licence and certification entries in the issuing registers, and a CV whose testimony list you have read. The working method is set out in Reading an expert's CV for admissibility risk and How attorneys find and vet expert witnesses.

Experts listed in Illinois

The docket holds 12 firms in Illinois: browse Illinois listings. Listings are Unclaimed public listings unless a firm has claimed its profile; see the Vetting Standard for what Listing-Checked and Document-Checked mean.

Summary source: published state admissibility compendia (Expert Institute state-by-state comparison; White & Williams Daubert chart; NCJI evidence-standards compendium), consulted 2026-11-02. Law changes; confirm the current standard in the forum. Not legal advice.