Law enforcement in Las Vegas said Thursday said the driver of the Tesla Cybertruck that exploded at the Trump International Hotel in Las Vegas was officially identified by coroners as Colorado Springs resident Matthew Livelsberger, 37, who shot himself in the head seconds before the explosion.

Livelsberger was a Green Beret who had spent the majority of his 19-year military career at Fort Carson and on assignment in Germany, according to the U.S. Army and the Las Vegas Metropolitan Police Department.

Master Sgt. Matthew Alan Livelsberger was on approved leave from the 10th Special Forces Group at Fort Carson, when the electric truck he rented in Denver on Dec. 28 exploded in the valet drive-through of the Trump International Hotel, Sheriff Kevin McMahill of the Las Vegas Metropolitan Police Department said Thursday at a news conference.

What Matthew Livelsberger texted ex days before Cybertruck explosion at Trump hotel in Las Vegas

The Las Vegas Metropolitan Police that through tattoo remnants, identification found in the vehicle and video surveillance showing Livelsberger as the sole driver, they ascertained that he was the suspect and suicide victim.

Police were awaiting DNA evidence for absolute confirmation.

The explosion caused minor injuries to seven people but virtually no damage to the hotel. McMahill said Livelsberger likely planned a more damaging attack but the steel-sided vehicle absorbed much of the force from the crudely built explosive.

A timeline of the days leading to Cybertruck explosion at Trump’s Las Vegas hotel

Damage from the blast was mostly limited to the interior of the truck because 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 the Bureau of Alcohol, Tobacco, Firearms and Explosives.

Authorities are 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.

The Associated Press contributed to this report.