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.

The tragic death of Green Beret Matthew Livelsberger, who died by suicide in a Tesla Cybertruck explosion outside Trump International Hotel in Las Vegas on New Year’s Day, has shed light on the mental toll of war.

Matthew Livelsberger was struggling with PTSD, which was a result of his military service where he saw deaths of his fellow soldiers and others.