In Cady v. Cargile, a Texas appellate court considered a tractor-trailer crash. The decedent was visiting a friend’s house and borrowed his pickup. Two miles away, he crashed into a tractor-trailer that was stuck, blocking all lanes of traffic, and he died. His mother sued the driver of the tractor-trailer and the trucking company for wrongful death. The jury found that the death arose out of the decedent’s own negligence and awarded no damages. The trial court ordered that the plaintiff take nothing on her claims.
The plaintiff appealed on the grounds that the trial court shouldn’t have admitted the trucking company’s expert testimony because it was irrelevant. The plaintiff contended that the expert’s methodology was unreliable and that there was too big a gap between the data and the opinion proffered. The appellate court explained that there is a two-part test that covers whether expert testimony is admissible. First, the expert needs to be qualified, and second, the testimony must be relevant and based on a reliable foundation.
The trial court has broad discretion to determine whether expert evidence is admissible or not. However, in examining whether the expert’s testimony is reliable, the court is not allowed to determine the correctness of conclusions. The expert testimony may be unreliable if the expert draws conclusions based on flawed reasoning or methodology. If there is too big a gap, as argued by the plaintiff here, the opinion may not be reliable.