Illusionist David Copperfield testified last month in a Las Vegas courtroom.
Illusionist David Copperfield testified last month in a Las Vegas courtroom.

LAS VEGAS — Illusionist David Copperfield was found negligent but not financially responsible for a British tourist’s injuries during a signature vanishing act that used participants from the audience of a Las Vegas Strip show in 2013, a jury said Tuesday.

Gavin Cox and his wife, Minh-Hahn Cox, alleged negligence by the multimillionaire magician, the MGM Grand hotel, two Copperfield business entities, and a construction firm that was renovating the hotel.

In a complex verdict reached after several weeks of testimony but only about two hours of deliberation, the state civil court jury found negligence by Copperfield, the hotel, and Copperfield’s company, Backstage Disappearing Inc.

But jurors found no liability for each of those named in the lawsuit, and instead found Cox 100 percent responsible for his own injuries. The verdict means the Coxes cannot seek monetary damages, court spokeswoman Mary Ann Price said.

Gavin Cox testified that he suffered brain and other injuries in a fall while stagehands urged him and others to run during an illusion that appeared to make as many as 13 audience volunteers disappear onstage and reappear moments later, waving flashlights in the back of the theater.

His lawyer,…