Expert Witnesses in Georgia Car Accident Cases
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An expert witness gives the jury opinions on questions ordinary experience cannot answer: how fast the cars were going, whether the forces could cause the injury, what future care will cost. In Georgia, the judge decides first whether the opinion is reliable enough to hear, under O.C.G.A. § 24-7-702, a test modeled on the federal Daubert decisions, and in a civil case any challenge must be resolved by the final pretrial conference.
The admissibility test
Section 24-7-702(b) lets a qualified expert give an opinion if four conditions are met:
- The expert’s specialized knowledge “will help the trier of fact to understand the evidence or to determine a fact in issue”.
- “The testimony is based upon sufficient facts or data”.
- “The testimony is the product of reliable principles and methods”.
- “The expert has reliably applied the principles and methods to the facts of the case.”
Except as it provides, the statute applies “in all proceedings” (§ 24-7-702(a)) and allows Georgia courts to draw on the federal decisions in Daubert, Joiner, and Kumho Tire (§ 24-7-702(f)). A party may ask for a pretrial hearing on whether the witness qualifies and whether the testimony meets the test, and “In all civil proceedings, a hearing and any ruling shall be completed no later than the final pretrial conference” (§ 24-7-702(d)).
Which experts answer which question
| Question in the case | Expert who can answer it |
|---|---|
| How the crash happened: speeds, positions, timing, sight lines | Accident reconstructionist |
| Whether the forces could cause the injury claimed | Biomechanical engineer |
| Diagnosis, cause, treatment, and prognosis | Treating physician or retained medical expert |
| What future care will cost | Life care planner, with medical support |
| What work the injured person can still do | Vocational expert |
| The present value of lost earnings and future costs | Economist |
| What federal safety rules required of a truck driver and carrier | Motor carrier safety expert |
A treating physician’s causation opinion is weighed against the person’s own records. Reconstruction is covered in more detail in how accident reconstruction is used in Georgia car accident cases.
When experts are not needed
Not every case calls for them. A clear rear-end impact with treatment records that tie the injury to the crash may be decided on the records, the drivers, and the witnesses. Experts add cost, and the reliability test applies to every expert either side calls. The question in each case is whether a fact in dispute needs specialized knowledge to explain.
Experts and the record
An expert’s opinion is only as good as the facts beneath it, which is why § 24-7-702(b)(2) requires “sufficient facts or data”. For a reconstructionist, that means the vehicles, their data, the scene measurements, and video, preserved before they disappear. For a medical expert, it means complete records from before and after the crash. How the lawsuit’s discovery stage fits in is covered in how to file a car accident lawsuit in Georgia.
Sources
- O.C.G.A. § 24-7-702 (text of the Official Code of Georgia Annotated, November 2022 release, including the 2022 amendment by House Bill 478).
This page describes Georgia law as of October 2026 for general information. It is not legal advice and does not create an attorney-client relationship.