Officials said the agent was shot on Interstate 91, which was closed for several hours near the border with Canada.

The fuming free speech-advocating president demanded an apology.

David "Chris" Maland, the U.S. Border Patrol agent allegedly killed by a German national during a traffic stop near the Vermont-Canada border on Monday, was an Air Force veteran.

Local law enforcement, state officials and the Border Patrol itself issued statements in the wake of the tragic incident.

A U.S. Border Patrol agent, who was shot and killed Monday during a traffic stop in Vermont, has been identified as David C. Maland, federal and state officials announced Tuesday.

David "Chris" Maland, 44, was fatally shot in the line of duty on Tuesday in Coventry, Vermont, according to the Vermont State Police. Maland was an agent with the U.S. Border Patrol Swanton Sector and was conducting a traffic stop at the time.

A United States Border Patrol agent was shot and killed in Vermont on Monday, according to The Department of Homeland Security.

An investigation was underway on Tuesday near the United States’ border with Canada, where an agent was fatally shot “in the line of duty,” authorities said

The federal officer killed while on duty near the Canadian border has been identified as a U.S. Air Force veteran who provided security at the Pentagon during the Sept. 11 attacks.

A U.S. Border Patrol agent who was killed in Vermont during a traffic stop near the Canadian border was a military veteran who worked security duty at the Pentagon during the time of the Sept. 11 attacks,

A Blue Earth, Minnesota, native who was working as a U.S. Border Patrol agent in Vermont was shot and killed on-duty near the Canadian border Monday.