Cars are backed up at the US-Canada border in Stanstead, Quebec, after a shooting involving a U.S. Border Patrol agent in Coventry, Vt., Monday, Jan. 20, 2025. (AP Photo/Chloe Jones)

HOLD This image taken from video provided by WCAX shows police cars closing off a road after a shooting involving a U.S. Border Patrol agent on Interstate 91 near Coventry, Vt., Monday, Jan. 20, 2025. (WCAX via AP)

Cars are backed up at the US-Canada border in Stanstead, Quebec, after a shooting involving a U.S. Border Patrol agent in Coventry, Vt., Monday, Jan. 20, 2025. (AP Photo/Chloe Jones)

A sign on an unpatrolled border street entering into Derby Line, Vermont, U.S.A., from Stanstead, Quebec, Tuesday, Jan. 21, 2025. (Christinne Muschi/The Canadian Press via AP)

CORRECTS TO JOAN MALAND INSTEAD OF MUSSA - This undated image courtesy of Joan Maland shows U.S. Border Patrol agent David Maland, who was killed Monday, Jan. 20, 2025, following a traffic stop in Vermont. (David Maland/Joan Maland via AP)

A sign on an unpatrolled border street entering into Derby Line, Vermont, U.S.A., from Stanstead, Quebec, oTuesday, Jan. 21, 2025. (Christinne Muschi/The Canadian Press via AP)

CORRECTS TO JOAN MALAND INSTEAD OF MUSSA - This undated image courtesy of Joan Maland shows U.S. Border Patrol agent David Maland and his K9 partner, Cora. David Maland was killed Monday, Jan. 20, 2025, following a traffic stop in Vermont. (David Maland/Joan Maland via AP)