THE decorated Green Beret who exploded a Tesla Cybertruck on New Year’s Day and shot himself in the head was suffering from PTSD, investigators have revealed.

Matthew Livelsberger, 37, had been served divorce papers just days before he drove the fuel-cannister-filled Tesla to the doorstep of the Trump International Hotel in Las Vegas, Nevada.

The firebomb, triggered around 9 am, injured seven pedestrians and sparked fresh terror fears as a deranged ISIS admirer, Shamsud-Din Jabbar, had just murdered 14 people in New Orleans hours earlier.

As the days went on, more similarities were drawn between Livelsberger and sick killer Jabbar – who was also a US Army veteran.

However, investigators disassociated the two in a solemn press conference where they revealed Livelsberger was a tragic victim of mental health struggles.

On Friday, the FBI admitted the Cybertruck bomber used the same rental service as Jabbar, who got a Chevrolet Silverado so he could plow through New Year’s partiers.

They also announced that Livelsberger briefly served at the same military base in North Carolina where Jabbar was previously stationed.

However, they said the two had no relationship as they uncovered notes written by Livelsberger that stated his death wasn’t a terrorist attack.

Heartbroken former partners of the fallen soldier have given an inside look at his final days before the bombing.

Alicia Arritt, who dated Livelsberger from 2018 to 2021, revealed the fallen soldier got a brain injury during his years of service in the Army.

In an emotional interview with The Denver Gazette, she described him as “the kindest man I ever knew” and said, “He got me through a difficult time. “

Days before his death, Livelsberger made the now-concerning decision to reach out to Arritt and show off the Cybertruck he had just picked up.

If you or someone you know is affected by any of the issues raised in this story, call or text the 988 Suicide & Crisis Lifeline at 988, chat on 988lifeline.org, or text Crisis Text Line at 741741.