ATF Operation Focused on Man Who Bought More than 700 Guns
By Kevin Johnson USA TODAY When Uriel Patino walked into a Glendale, Ariz., gun store last August and placed an order for 20 handguns, federal gun agents already knew the 25-year-old man as the most prolific figure in a trafficking ring that was supplying hundreds of guns to Mexico’s brutal Sinoloa drug cartel, according to…