LAS VEGAS (AP) — The highly decorated Special Forces soldier who died by suicide in a Cybertruck explosion on New Years Day confided to a former girlfriend — who had served as an Army nurse — that he faced significant pain and exhaustion that she says were key symptoms of traumatic brain injury.

Matthew Livelsberger, the soldier who died in the Las Vegas truck explosion, left a note saying it was a stunt to serve as a wakeup for the country’s ills.

A highly decorated Army soldier who died in an explosion of a Tesla Cybertruck at the Trump hotel in Las Vegas left a note saying it was stunt to serve as “wakeup call” for the country’s ills,

Authorities say they know that a highly decorated Army soldier shot himself in the head inside a Tesla Cybertruck packed with fireworks that exploded outside Trump's Las Vegas hotel

During a news conference Friday, federal and state officials in Las Vegas revealed the Colorado soldier who shot himself in the head before the Cybertruck he was in exploded outside the Trump Hotel "likely suffered from PTSD" as clues into his motives were revealed.