Matthew Livelsberger mostly bore that burden in private but recently sought treatment for depression from the Army, according to a U.S. official.

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.

In text messages to his ex-girlfriend, the soldier raised the curtain on the stress he felt by reliving the violence of his deployment.