Ex-Air Force staff sergeant pleads guilty to killing federal guard

A former Air Force staff sergeant and alleged member of the “boogaloo” extremist movement pleaded guilty Friday in the fatal shooting of a federal security officer in the San Francisco Bay Area amid large 2020 protests against police brutality.

Steven Carrillo, 33, changed his plea to guilty to a federal murder charge in the killing of David Patrick Underwood and to the attempted murder of Underwood’s colleague after federal prosecutors last month agreed not to seek the death penalty.

The men were shot on May 29, 2020, while they stood in a guard shack in front of a federal building in Oakland.

At the time of his arrest, Carrillo was the leader of a team of highly trained Air Mobility Command security forces.