The Clanton Ranch grew into a successful enterprise. During his testimony after the shootout at the O.K. Corral, Clanton claimed to have raised and purchased about 700 head of cattle during the past year, and the Clanton ranch was one of the most profitable cattle ranches in that part of the country. However, the Clantons never registered a brand in either Cochise County or Pima County which was required to legally raise cattle. The Clantons were reputed to be among a group of outlaw Cowboys who crossed the border into Mexico where they stole cattle and re-sold them to the hungry miners in Cochise County. Curly Bill Brocius, Tom and Frank McLaury bought and sold stolen cattle to Old Man Clanton, among others. The Mexican government at the time placed high tariffs on goods transported across the border, making smuggling a profitable enterprise.