A drunker tractor-trailer driver making a delivery to the Walmart in Secaucus struck a vehicle in the parking lot and then admitted to police that he had a loaded gun, authorities said. Secaucus police responded to 400 Park Plaza Dr. at 9:45 p.m. Friday on the report of the minor crash. During the course of the investigation it became apparent to police that the driver, 30-year-old James Milien, was intoxicated, Police Chief Dennis Miller said.