The driver of the Tesla Cybertruck that burst into flames outside President-elect Donald Trump’s Las Vegas hotel shot himself in the head before exploding and likely planned to do more damage, but the explosives lacked the power and steel body of the vehicle absorbed much of the blast, officials said Thursday.

Clark County Sheriff Kevin McMahill said at a news conference that a handgun was found at the feet of the man in the driver’s seat, believed to be Matthew Livelsberger, 37, of Colorado. The shooting appears to have been self-inflicted, officials said.

Damage from the blast was mostly contained to the interior of the vehicle as the blast did not hit the doors of the Trump Hotel a few feet away, the sheriff said.

“The level of sophistication is not what we would expect from a person with this type of military experience,” said Kenny Cooper, special agent in charge of the Bureau of Alcohol, Tobacco, Firearms and Explosives.

Among other charred items found inside the truck were a second firearm, a set of fireworks, a passport, a military ID, credit cards, an iPhone and a smartwatch, McMahill said. Authorities said both guns were purchased legally.

Investigators have not definitively identified Livelsberger’s body, but identifications and tattoos on his body “are a strong indication that it’s him,” the sheriff said.

Lievelsberger served in the Green Berets, a highly trained special force tasked with countering terrorism overseas and training partners, the military said in a statement. He had served in the Army since 2006, rising through the ranks with extensive overseas experience, serving twice in Afghanistan, Ukraine, Tajikistan, Georgia and Congo, the Army said.