He was enrolled in a training program for special operations forces at Joint Base Lewis-McChord four years ago.

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

The highly decorated special forces soldier in a Cybertruck explosion in Las Vegas told a former girlfriend he faced pain, exhaustion after Afghanistan.

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