Livelsberger enrolled in the Army’s “Advanced Special Operations Techniques” (ASOT) course, an 18-week training program at JBLM for special operations units. But Arritt said he failed to complete the course.

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

Tricia Kean outlines what we're learning about Matthew Livelsberger from his ex-girlfriend, Alicia Arritt. Investigators say Livelsberger died by suicide in the explosion outside the Trump International Hotel last week.