U.S. law enforcement is searching for clues to solve the mystery behind the Tesla vehicle that exploded outside the Trump International Hotel in Las Vegas earlier this week, slightly injuring seven people.

The man who rented the Cybertruck, then drove it into town and parked it outside the hotel, was identified as Matthew Alan Livelsberger, a 37-year-old active duty U.S. Special Forces soldier.

Police found his lifeless body in the charred Tesla with a self-inflicted gunshot wound. They also found fuel cans and more than a dozen firework mortars in the back of the vehicle.

On Thursday there was still an increased police presence at the hotel, which is located directly on the busy Las Vegas Strip. Yellow police tape cordoned off a small portion of the hotel entrance as employees worked to repair damage to the facade.

Authorities continue to work to compile information and many questions remain.

It’s unclear, for example, why Livelsberger rented the car – or whether the perpetrator planned to make a political statement ahead of Donald Trump’s return to the White House later this month.

One of the biggest unanswered questions is why Livelsberger rented the Tesla and drove it more than 800 miles (1,300 km) from Colorado to Las Vegas.

Las Vegas police said he rented the vehicle in Denver on Dec. 28. They were able to track his movements using photos taken while driving and information from Tesla’s charging technology. He was the only one seen driving it, they said.

The vehicle arrived in the city on Wednesday morning, less than two hours before the explosion, police said.

Las Vegas Sheriff Kevin McMahill said Thursday that a body was recovered in the vehicle. It was burned beyond recognition, but the county medical examiner confirmed through DNA and dental records that Livelsberger was in the Cybertruck at the time of the explosion. He was found with a self-inflicted gunshot wound to the head.

“I feel comfortable calling it a suicide because there was a bombing immediately after,” Sheriff McMahill said. He added that no motive for the incident has been established.

Another big question is whether the explosion was intended as a statement ahead of the U.S. presidential transition later this month.

Police have found no evidence linking the alleged perpetrator to specific political beliefs. However, she said she was investigating whether the incident was related to the hotel being owned by President-elect Donald Trump or Elon Musk running Tesla.

Trump recently named Musk co-head of a presidential advisory commission, the Department of Government Efficiency, after the two became close during Trump’s campaign.

“It is not lost on us that it is in front of the Trump Building and that it is a Tesla vehicle,” Spencer Evans, an FBI agent based in Las Vegas, said Thursday.

“But we have no information at this point that definitively tells us or suggests that (the incident) was due to any particular ideology,” he said.

The explosion occurred just hours after a man drove a pickup truck along crowded Bourbon Street in New Orleans, Louisiana, in New Year’s celebrations, killing 14 people and injuring dozens more.

The attacker was identified as Shamsud-Din Jabbar, a 42-year-old US citizen who also served in the US Army.

President Joe Biden said investigators were looking into whether the two incidents were related, although nothing had been found so far to suggest they were.

However, the question continues to be fueled by the obvious similarities between the two incidents and some biographical details of the drivers of both vehicles.

Both incidents occurred in the early hours of New Year’s Day. Both men served in the US armed forces – including at the Fort Liberty military base (formerly Fort Bragg) in North Carolina – and both completed a tour of duty in Afghanistan. Both men also rented the vehicles they used through a mobile car rental application called Turo.

However, police said there was no evidence that the two men were in the same unit or served at Fort Liberty at the same time. Although both were deployed to Afghanistan in 2009, there is no evidence that they served in the same province, location or unit.

In the attack in New Orleans, police recovered an Islamic State (IS) group flag from the vehicle used by Jabbar. They added that he posted videos on social media shortly before declaring his allegiance to the group. Police determined Jabbar acted alone.

Meanwhile, in Las Vegas, there is no evidence that Livelsberger was motivated by ISIS or that he and Jabbar ever had contact. The police have indicated that the investigation is still ongoing.

Livelsberger was a decorated special forces intelligence sergeant who served in Germany but was on approved leave at the time of the incident.

His father told BBC US affiliate CBS News that his son was in Colorado to see his wife and eight-month-old daughter.

He said he last spoke to his son at Christmas and everything seemed normal.

The Daily Beast reported that Livelsberger was a “huge” supporter of Trump. A senior police official who spoke to Livelsberger’s family told the media that Livelsberger voted for Trump in the November election.

His uncle told The Independent that Livelsberger loved Trump “and he was always a very, very patriotic soldier, a patriotic American.”