The highly decorated soldier who exploded a Tesla Cybertruck outside the Trump hotel in Las Vegas used generative AI including ChatGPT to help plan the attack, Las Vegas police said Tuesday.
A laptop, cellphone and watch are still under review nearly a week after 37-year-old Matthew Livelsberger fatally shot himself just before the truck blew up.
An investigation of Livelsberger's searches through ChatGPT indicate he was looking for information on explosive targets, the speed at which certain rounds of ammunition would travel and whether fireworks were legal in Arizona.
Kevin McMahill, sheriff of the Las Vegas Metropolitan Police Department, called the use of generative AI a "game-changer" and said the department was sharing information with other law enforcement agencies.
"This is the first incident that I'm aware of on U.S. soil where ChatGPT is utilized to help an individual build a particular device," he said. "It's a concerning moment."
During a roughly half-hour-long news conference, Las Vegas police and federal law enforcement officials unveiled new details about the New Year's Day explosion.
Among the details law enforcement disclosed: Livelsberger stopped during the drive to Las Vegas to pour racing-grade fuel into the Cybertruck, which then dripped the substance. The vehicle was loaded with 27 kilograms (60 pounds) of pyrotechnic material, and officials are still uncertain exactly what detonated the explosion but said it could have been the flash from the firearm that Livelsberger used to fatally shoot himself.