Jack Teixeira, the Massachusetts Air National Guard member accused of leaking highly classified military documents about Russia’s war in Ukraine and other national security secrets, is expected to plead guilty on Monday in federal court.

The 22-year-old is due to appear in Boston’s federal courthouse for a change of plea hearing nearly a year after he was arrested in the case stemming from the most consequential national security leak in years.

Teixeira, of North Dighton, Massachusetts, has been behind bars since his April arrest in the case that raised alarm over America’s ability to protect its most closely guarded secrets and forced the Biden administration to scramble to try to contain diplomatic and military fallout.

Read more at wpri.com.