David “Chris” Maland, the Border Patrol agent killed Monday, was shot while conducting a traffic stop in a Vermont town near the Canadian border, according to the FBI’s latest update on the case.

David Maland, 44, was a military veteran who worked security duty at the Pentagon during the Sept. 11 attacks, his family said.

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.

U.S. Border Patrol Agent David "Chris" Maland was fatally shot during a traffic stop in northern Vermont on Monday afternoon.

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.

The FBI and local law enforcement were investigating a shooting involving a United States Border Patrol agent in Coventry, Vermont.

A U.S. Border Patrol agent was fatally shot Monday on a highway in northern Vermont south of the Canadian border, authorities said. The death was confirmed by the FBI and Benjamine Huffman, acting secretary of the Department of Homeland Security in Washington.