By Matthew Brown and Colleen SlevinAssociated PressARIVACA, Ariz. — A man who authorities say was involved in a human smuggling operation was shot Tuesday in an exchange of gunfire with the U.S. Border Patrol and after firing at a federal helicopter near the U.S.-Mexico border, authorities said. Federal agents were attempting to apprehend the 34-year-old Arizona man during a traffic stop near Arivaca, Arizona, when he fled and shot at a Border Patrol helicopter and at agents, authorities said. Prior to the shooting, agents had attempted to stop the same vehicle but the occupants drove away, Nanos said. The Pima County Sheriff’s Department said the FBI asked it to lead a use-of-force investigation of the Border Patrol. Agents regularly patrol the area because it’s a common path for drug smugglers and migrants who illegally cross the border.