A United States Border Patrol agent was involved in a shooting near Arivaca, Arizona, leaving one person in critical condition. Authorities say the incident occurred during a pursuit close to the United States-Mexico border, where the wounded individual reportedly exchanged gunfire with agents and fired at a federal helicopter. The Federal Bureau of Investigation is leading an investigation into an alleged assault on a federal officer, with the Pima County Sheriff's Department conducting a parallel use-of-force inquiry. The identity of the person shot has not been released, and officials urge the public to be patient as the investigation continues.