NEW : Mexico : The violence sparks `` serious doubts about the use of lethal force '' Notimex : A U.S. Border Patrol agent shoots and kills an adolescent . A U.S. Border Patrol agent shot and killed an adolescent who had been throwing rocks alongside several others at the border , the state-run Notimex news agency said , citing anonymous sources . This is a rush transcript from "On the Record," February 16, 2011. An agent opened fire in response to rock-throwing . The FBI is investigating .
NEW : Mexico : The violence sparks `` serious doubts about the use of lethal force '' Notimex : A U.S. Border Patrol agent shoots and kills an adolescent . This is a rush transcript from "On the Record," February 16, 2011. An agent opened fire in response to rock-throwing . The FBI is investigating .