Daubert Hearing and Forensic Challenges in Georgia

A Daubert hearing is the pretrial proceeding through which a Georgia trial court decides, before a jury ever hears it, whether proposed expert testimony meets the reliability requirements of O.C.G.A. § 24-7-702. The hearing is the procedural mechanism for that gatekeeping decision, distinct from the substantive reliability standard the court applies once the hearing is underway. This page focuses on how the hearing itself works, including its particular relevance to forensic science disciplines.

How the Hearing Is Triggered

Section 24-7-702 authorizes a trial court to hold a hearing upon motion of a party to determine whether expert testimony satisfies the statute’s qualification and reliability requirements. A formal evidentiary hearing is not automatically required in every case where expert testimony is offered; the judge’s gatekeeping obligation can sometimes be satisfied through the parties’ briefing and the existing record. When a party files a motion challenging proposed expert testimony, however, the court is expected to engage with the qualification and reliability questions in a meaningful way before the testimony reaches the jury. House Bill 478, enacted in 2022, extended this pretrial-hearing framework to criminal cases, formalizing its application beyond the civil context in which it originated.

What the Hearing Examines

A Daubert hearing in Georgia addresses two related but distinct questions. First, it asks whether the proposed witness qualifies as an expert based on knowledge, skill, experience, training, or education in the relevant field. Second, assuming qualification, it asks whether the witness’s testimony meets the statute’s three-part reliability requirement: that the testimony is based on sufficient facts or data, that it is the product of reliable principles and methods, and that the witness applied those principles and methods reliably to the facts of the case. A witness can be highly credentialed and still have testimony excluded if the methodology applied in the specific case does not meet this standard.

The Judge’s Gatekeeping Role

The trial judge functions as a gatekeeper, with an affirmative obligation to screen out unreliable expert opinion before it is presented to the jury. This role exists because jurors may have difficulty independently evaluating the soundness of specialized scientific or technical methodology, and an expert’s credentials alone can carry undue persuasive weight regardless of whether the underlying method is sound. The burden of establishing that expert testimony meets the admissibility requirements falls on the party offering the expert, not on the party challenging it; the proponent must affirmatively demonstrate reliability rather than rely on the absence of a successful objection.

Forensic-Discipline Applications

The hearing procedure takes on particular significance in cases involving forensic science. Courts applying Georgia’s reliability requirement to forensic disciplines, including DNA analysis, firearms and toolmark comparison, and digital forensics, hold the proponent to the same qualification and reliability inquiry used in other expert-testimony contexts; the hearing does not relax that inquiry simply because the subject matter is scientific or technical. Disciplines that rely heavily on subjective pattern-matching judgments by an examiner, as opposed to instrument-based measurement, tend to draw closer scrutiny in this hearing, because subjective comparison methods are harder to validate through controlled testing than methods producing quantifiable, replicable results.

Timing and Preservation

Because the hearing operates as a pretrial gatekeeping mechanism, a party seeking to challenge expert testimony should raise the issue before trial, typically through a motion in limine, so the court can resolve admissibility before the jury is exposed to the testimony. Raising a Daubert-type objection only after testimony has already been heard limits the court’s ability to function as an effective gatekeeper and can affect how the issue is treated on review.

Standard of Review

A trial court’s ruling on the admissibility of expert testimony following a Daubert hearing is reviewed on appeal under a deferential standard. Appellate courts generally will not disturb the trial court’s determination absent an abuse of discretion, reflecting the trial judge’s direct, firsthand role in evaluating the qualifications of the witness and the reliability of the methodology presented.

This article provides general information about Georgia law and is not legal advice. Consult a licensed Georgia attorney about a specific situation.