Court paperwork has revealed the names of the suspects in the deadly shooting of a Border Patrol agent in Vermont.WCAX News first broke the news Monday after Agent David Maland was killed in the line of duty during a traffic stop on Interstate 91 in Coventry.

Teresa Youngblut, 21, was charged in Monday’s killing of Border Patrol Agent David Maland, the FBI said. It said Youngblut and a German man who died in the firefight had been under surveillance for several days.

Agent David “Chris” Maland died in a shooting following a traffic stop, the FBI said. A second person killed in the incident was a German national in the country on a current visa, authorities said.