Truck crash cases frequently turn on technical questions that lie outside the everyday knowledge of jurors. Accident reconstruction, vehicle mechanics, human factors, the interpretation of electronic data, and the analysis of injuries all commonly require expert testimony. When each side retains qualified experts who reach opposite conclusions, the case becomes what lawyers call a “battle of the experts.” Georgia law has a defined approach to these situations, and it divides responsibility carefully between the judge and the jury.
The two roles: gatekeeper and fact-finder
Georgia resolves competing expert testimony through a two-part division of labor. The trial judge serves as a gatekeeper who decides whether expert testimony is admissible at all. The jury, as the fact-finder, decides which admissible expert testimony to believe and how much weight to give it.
This division is fundamental. The judge does not decide which expert is correct. The judge decides whether each expert’s testimony is reliable and relevant enough to be heard. Once testimony clears that threshold, the contest between the experts is for the jury to resolve.
The admissibility standard under O.C.G.A. § 24-7-702
Expert testimony in Georgia civil cases is governed by O.C.G.A. § 24-7-702. The statute permits a witness qualified as an expert by knowledge, skill, experience, training, or education to give opinion testimony if four conditions are met. The expert’s specialized knowledge must help the trier of fact understand the evidence or determine a fact in issue. The testimony must be based on sufficient facts or data. The testimony must be the product of reliable principles and methods. And the expert must have reliably applied those principles and methods to the facts of the case.
Georgia follows the Daubert standard for evaluating expert reliability, and the statute directs Georgia courts to consider federal case law interpreting the corresponding federal rule. Under Daubert, courts may consider factors such as whether a method can be and has been tested, whether it has been subject to peer review and publication, the known or potential rate of error, and whether the method is generally accepted in the relevant field.
The gatekeeping decision and pretrial hearings
The trial judge’s gatekeeping function is exercised before the jury hears the disputed testimony. A party may move to exclude an opposing expert, and the court may hold a pretrial hearing to determine whether the witness qualifies as an expert and whether the testimony meets the statutory requirements. O.C.G.A. § 24-7-702 provides that in civil proceedings, any such hearing and ruling are to be completed no later than the final pretrial conference.
At this stage, the judge examines qualifications and methodology. An expert whose opinions rest on unreliable methods, insufficient data, or analysis not properly tied to the facts may be excluded in whole or in part. Importantly, the gatekeeping inquiry focuses on reliability of method, not on which conclusion is right. Two experts can both use sound methods and still reach different conclusions; in that situation, both may be admitted.
What the gatekeeping role does not do
Georgia courts, consistent with the federal approach the statute incorporates, have been clear that the gatekeeper role is not meant to replace the jury. The trial judge’s gatekeeping function is not intended to supplant the adversary system. The recognized means of challenging admissible but contestable expert testimony are vigorous cross-examination, the presentation of contrary evidence, and careful jury instruction on the burden of proof.
This principle is central to how a battle of the experts is resolved. If both experts pass the reliability threshold, the judge does not pick a winner. The disagreement is presented to the jury, and the adversarial process is trusted to expose weaknesses.
How the jury resolves competing testimony
When opposing experts both testify, the jury weighs them. Jurors may consider each expert’s qualifications and experience, the facts and data the expert relied upon, the soundness and consistency of the reasoning, the expert’s performance on cross-examination, and any indications of bias, such as the fee arrangement or a history of testifying for one side.
The jury is free to accept one expert’s testimony over another’s, to accept parts of each expert’s testimony, or to reject expert testimony that it finds unconvincing. Jurors are not required to defer to an expert simply because the witness holds credentials. The fact-finder evaluates expert testimony alongside all other evidence in the case.
The role of cross-examination and instructions
Because the adversarial process carries the weight of resolving expert disputes, cross-examination is the primary tool for testing a competing expert. Cross-examination can probe the assumptions an expert made, the data the expert ignored or lacked, the limits of the methodology, and inconsistencies between the expert’s opinion and the physical evidence.
The trial court also instructs the jury on how to evaluate expert testimony. Georgia jury instructions generally explain that expert opinion is not binding and that the jury determines what weight to give it. These instructions reinforce that the jury, not the experts, decides the disputed facts.
Application in truck crash cases
In a truck crash case, a battle of the experts might involve reconstruction experts who disagree about speed, braking, or point of impact, or it might involve disagreement over the interpretation of electronic control module data, the cause of a mechanical failure, or the extent and cause of injuries.
The judge’s task is the same regardless of subject matter: determine whether each expert is qualified and whether the methodology is reliable and properly applied. If both sides present experts who satisfy O.C.G.A. § 24-7-702, both opinions go to the jury. The jury then resolves the conflict by deciding which analysis it finds more persuasive in light of the entire record.
Summary
Georgia judges resolve a battle of the experts in truck crash cases by performing a gatekeeping function under O.C.G.A. § 24-7-702 and the Daubert standard, screening expert testimony for qualification, reliable methodology, sufficient data, and proper application. The judge does not decide which expert is right. When competing experts both satisfy the admissibility standard, their conflicting opinions are presented to the jury, and the jury resolves the disagreement through the adversarial process of cross-examination, contrary evidence, and careful instruction on the burden of proof.
Disclaimer
This article is provided strictly for general educational and informational purposes. It is intended to explain how Georgia law works as a matter of public legal education, and it does not constitute legal advice, a legal opinion, or a recommendation about any particular course of action. Reading this article, or contacting the website on which it appears, does not create an attorney-client relationship between the reader and any law firm, attorney, or author.
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