The U.S. Court of Appeals for the Fifth Circuit has a rejected a products liability claim against Apple alleging that a woman's neurobiological response to looking at a text message on her iPhone 5 while behind the wheel was the cause of a car crash that killed two people and paralyzed a child.

The Fifth Circuit's decision in Meador v. Apple focuses on a 2013 wreck involving Ashley Kubiak, who was driving her pickup truck when she looked down to read a text message on her phone. She then turned her attention back to the road, but at that point it was too late, and the collision killed two adults and rendered a child paraplegic. Kubiak was later convicted of two counts of criminally negligent homicide.

Family members later sued Apple in Tyler, Texas federal court for negligence and product liability. The plaintiffs' complaint alleged that Apple, because of its concern over texting-while-driving accidents, had secured a patent covering a lockout mechanism for hand-held devices, but did not implement any version of the mechanism on the iPhone 5.

The plaintiffs also alleged that Apple failed to warn iPhone 5 users about the risks of distracted driving. Specifically, the plaintiffs cited studies and reports concluding that the receipt of a text message triggers in the recipient “an unconscious and automatic neurological compulsion to engage in texting behavior.”

Apple filed a motion to dismiss for failure to state a claim. And the Eastern District of Texas court later granted Apple's motion. The plaintiffs appealed to the Fifth Circuit.

In its decision on Dec. 18, the Fifth Circuit noted that no court in Texas has addressed whether a smartphone manufacturer can be held liable for a user's tortious acts because of a neurobiological response induced by a phone.

And because there was no guidance from Texas courts on the matter, the Fifth Circuit had to make a so-called Erie guess on how the Texas Supreme Court would rule in the case.

The Fifth Circuit found that the closest analogy in Texas civil law to the liability proposed by the plaintiffs is the state's dram shop law, which permits sellers of alcohol to be held liable for the torts committed by the intoxicated customers they serve. The court also noted that the dram shop law was the product of the Texas Legislature, a statute that was later vetted by state courts.

“To the extent there is a meritorious analogy between smartphone manufacturers and dram shops, it is for the state to explore, not us,” wrote Judge Stephen Higginson. “With the state not yet speaking to this issue, we note that the debilitating effects of alcohol have been recognized much longer than the effects of smartphones, and the proper regulation of the former has been debated much longer than the latter.

“Moreover, the law development that has occurred places the onus of distracted driving on the driver alone,” Higginson explained, referencing a 2017 law passed by the Texas Legislature that criminalizes reading, writing or sending a text message while driving.

“We therefore cannot say that Texas law would regard a smartphone's effect on a user as a substantial factor in the user's tortious acts. To say otherwise would be an innovation of state law that Erie does not permit us to make,” Higginson wrote. “Because we decline to consider 'neurobiological compulsion' a substantial factor under Texas law, we conclude that the iPhone 5 could not be a cause in fact of the injuries in this case.”

Greg Love, a Henderson attorney who represents the plaintiffs in the case, said his clients are considering their appellate options. A big issue in the case is whether Apple designed the iPhone 5 in a way that stimulates a user's brain function so that the phone would be used compulsively, he said.

“That's the issue that the Fifth Circuit identified as something they view as innovative,” Love said. “And that's the key issue in terms of liability, and that's what the trial court missed, in my opinion.''

Theodore J. Boutrous of Gibson, Dunn & Crutcher who represents Apple in the case did not return a call for comment.