The Capitol Police officer who fatally shot Ashli Babbitt outside a door of the U.S. Capitol has been formally exonerated after an internal investigation, according to a department memo obtained by NBC News.

The officer, whose name has not been released, opened fire on Babbitt as she and a mob of other Trump supporters tried to forcefully enter the Capitol on Jan. 6.

Video of the shooting showed Babbitt in front of a crowd of rioters trying to get through a door leading to where members of Congress were being evacuated on the House side of the building.

The Justice Department announced in April that no charges were being brought against the officer. The exoneration by the Capitol Police wraps up the last remaining investigation into the incident.

A memo from the commander of the Capitol Police’s Office of Personal Responsibility says “no further action will be taken in this matter” after the officer was exonerated for use of force.

The Capitol Police did not immediately respond to a request for comment.

Babbitt, an Air Force veteran, was a decorated security forces controller who served multiple Middle East tours from 2004 to 2016, according to Air Force records.