Carlos García - Arellanes pleaded guilty to killing U.S. border agent Brian Terry . His conviction was linked to the ` ` Fast and Furious '' murders . Customs officials wanted to seize weapons used for drug trafficking . Terry was killed in a gun battle occurred in 2010 on the Arizona - Mexico border .
Manuel Osorio-Arellanes pleaded guilty to killing U.S. border agent Brian Terry . His conviction was linked to the `` Fast and Furious '' operation . U.S. officials wanted to track weapons intended for drug cartels . Terry was killed in a gun battle occurred in 2010 on the Arizona-Mexico border .