The highly decorated Army soldier inside a Tesla Cybertruck packed with fireworks that exploded outside Trump International Hotel in Las Vegas shot himself in the head just before detonation, authorities said Thursday.
The explosion caused minor injuries to seven people but virtually no damage to the hotel.
Clark County Sheriff Kevin McMahill said Matthew Livelsberger, a 37-year-old Green Beret, likely planned a more damaging attack but the steel-sided vehicle absorbed much of the force from the crudely built explosive.
Damage from the blast was mostly limited to the interior of the truck. The explosion "vented out and up" and didn't hit the Trump hotel doors just a few feet away, the sheriff said.
"The level of sophistication is not what we would expect from an individual with this type of military experience," said Kenny Cooper, a special agent in charge for the Bureau of Alcohol, Tobacco, Firearms and Explosives.
Authorities were still working to determine a motive.
"It's not lost on us that it's in front of the Trump building, that it's a Tesla vehicle, but we don't have information at this point that definitively tells us or suggests it was because of this particular ideology," said Spencer Evans, the Las Vegas FBI's special agent in charge.
Livelsberger had recently returned from an overseas assignment in Germany and was on approved leave when he died, according to a U.S. official.
A law enforcement official said investigators learned through interviews that he might have gotten into a fight with his wife about relationship issues shortly before he rented the Tesla and bought the guns. The official spoke on the condition of anonymity because of a lack of authorization to discuss the investigation.
Among other charred items found inside the truck were a second firearm, a number of fireworks, a passport, a military ID, credit cards, an iPhone and a smartwatch, McMahill said. Authorities said both guns were purchased legally.
The body of Livelsberger, of Colorado Springs, was burned beyond recognition, but investigators identified him Thursday. The cause of death was suicide by gunshot, according to the Clark County coroner.
Livelsberger served in the Green Berets, highly trained special forces who work to counter terrorism abroad and train partners. He had served in the Army since 2006, rising through the ranks with a long career of overseas assignments, deploying twice to Afghanistan and serving in Ukraine, Tajikistan, Georgia and Congo, the Army said.
He was awarded five Bronze Stars, including one with valor for courage under fire, a combat infantry badge and an Army Commendation Medal with valor.
McMahill said Livelsberger rented the Tesla electric vehicle in Denver on Saturday, and the sheriff displayed a map showing that it was charged in the Colorado town of Monument near Colorado Springs on Monday. On New Year's Eve, it was charged in Trinidad, Colorado, and three towns in New Mexico along the Interstate 40 corridor.
Then on Wednesday, the day of the explosion, it was charged in three Arizona towns before video showed it on the Las Vegas Strip about 7:30 a.m.
McMahill said investigators obtained charging station photos showing Livelsberger "was the individual that was driving this vehicle" and was alone.
"We're not aware of any other subjects involved in this particular case," the sheriff said.
Authorities searched a townhouse in Colorado Springs on Thursday as part of the investigation. Neighbors said the man who lived there had a wife and a baby and did not give any sign of posing a danger to anyone.
The explosion of the truck, packed with firework mortars and camp fuel canisters, came hours after Shamsud-Din Jabbar, 42, rammed a truck into a crowd in New Orleans' French Quarter early on New Year's Day, killing at least 14 people before being shot to death by police. That crash was being investigated as a terrorist attack.
The FBI said Thursday that they thought Jabbar acted alone, reversing its position from a day earlier that he likely worked with others.
Both Livelsberger and Jabbar spent time at the base formerly known as Fort Bragg, a massive Army base in North Carolina that is home to multiple Army special operations units. However, one of the officials who spoke to the AP said there was no overlap in their assignments at the base, now called Fort Liberty.
Chris Raia, FBI deputy assistant director, said Thursday that officials have found no definitive link between the New Orleans attack and the truck explosion in Las Vegas.
