A woman charged in the January killing of a U.S. Border Patrol agent during a Vermont traffic stop fired the bullet that struck him in the neck, authorities say in a new report. Another agent fired back during the Jan. 20 stop, wounding Teresa Youngblut and killing her companion, Felix Bauckholt, the U.S. Customs and Border Protection said in a statement Wednesday. Youngblut and Bauckholt were affiliated with the Zizians, a cultlike group that has also been linked to killings in Pennsylvania and California, authorities allege.