Expert testimony often plays a decisive role in cases involving technical or scientific evidence. A Daubert challenge ranks among the most significant procedural tools available to either side. Understanding how it works can help you assess the strength of a case well before it reaches a jury.
What does the Daubert standard require?
The Daubert standard comes from a U.S. Supreme Court decision that established a framework for determining whether expert testimony is admissible at trial. Under this standard, the trial judge acts as a gatekeeper who assesses both the relevance and reliability of proposed evidence.
Oklahoma adopted its own version of this standard to govern expert testimony in state courts. The rule requires that witnesses’ opinions draw on sufficient facts or data, are the product of reliable principles and methods, and reliably apply them to the facts at hand.
How does a challenge reach the court?
A party typically raises a Daubert challenge through a pretrial motion, often called a motion in limine. The movant argues that the opposing side’s expert does not meet the threshold for admissibility and asks the court to exclude the testimony before trial begins.
The motion identifies the specific expert, outlines the opinions that the party intends to offer and explains why it fall short of the Daubert criteria. The opposing party then responds, and the court may hold a hearing to evaluate arguments from both sides.
Where does the case go after a ruling?
If the court grants a Daubert challenge, it excludes the expert’s testimony in whole or in part. This ruling can fundamentally change the direction of litigation, particularly when a party’s claims or defenses depend heavily on that testimony.
In a products liability case, for example, excluding a plaintiff’s causation specialist may leave the plaintiff unable to prove a critical element of the claim. In a medical malpractice matter, excluding a defense expert on the standard of care can significantly weaken that side’s position.
A Daubert ruling does not always end the issue. The court may allow the witness to revise a report, narrow the scope of testimony or take other corrective steps, and either side may seek appellate review under limited circumstances.
Why does early preparation matter?
Anticipating a challenge calls for attention well before trial. The choice of expert matters. So do the methods that they use and the way the legal team records opinions. All of these affect whether the testimony holds up under scrutiny.
Cases involving technical or specialized evidence often rise or fall on testimony. Spotting weak points early gives you the chance to fill gaps, bring in additional experts or shift strategy before the other side files a motion.