El Paso Border Patrol Shooting Murky

U.S. and Mexican officials are trading suggestions of misconduct as the shooting of a 15-year-old Mexican by a U.S. Border Patrol agent on the border with Texas swells into a full-blown international incident.

Arturo Sandoval, spokesman for the Chihuahua state Attorney General’s Office, says a shell casing was found near the body. A spokesperson for the Chihuahua state Attorney General’s Office told ABC-7 it was a .40 caliber shell casing that was found next to the body of teenage boy.

A U.S. official close to the investigation says a video shows what appear to be four Mexican law enforcement agents crossing the border, picking up an undetermined object and returning to Mexico.

The official says on condition of anonymity the video shows the Border Patrol agent who shot the boy never entered Mexico.

The FBI said Tuesday the agent fired at rock throwers Monday evening.