Master Sgt. Matthew Livelsberger, a highly decorated Special Forces soldier, had three recent visits for mental health treatment.

Master Sgt. Matthew Livelsberger, an active duty Green Beret for almost 20 years, shot himself just before the truck exploded, police said.

Despite the symbolism that might be associated with exploding a Tesla Cybertruck outside the Trump International Hotel in Las Vegas, law enforcement officials said Thursday they were still trying to piece together why a five-time Bronze Star recipient and new father would orchestrate the New Year’s Day blast.