TEXAS/MEXICO BORDER - A fatal border shooting, involving a U.S. Border Agent and a teenage Mexican boy, is blowing up into an international incident.
Mexican and U.S. officials are pointing fingers after a border agent allegedly fired a shot across the border and killed the boy.
That agent reportedly fired into a crowd of rock throwers at the international bridge near downtown El Paso.
On Tuesday, the Mexican Attorney General said a shell casing was found by the boy's body.
But U.S. officials say a video shows four Mexican law enforcement agents, cross the border, pick something up and go back to Mexico.