Diego Montoya Sanchez once on the FBI's most-wanted list has pleaded not guilty to U.S. cocaine trafficking charges

Reputed Colombian drug kingpin once on the FBI's most-wanted list has pleaded not guilty to U.S. cocaine trafficking charges.Diego Montoya Sanchez entered the plea Thursday before a Miami federal judge. Prosecutors say the 46-year-old Montoya was chief of Colombia's North Valley Cartel that has smuggled vast quantities of cocaine to the U.S. over the years.Montoya was extradited from Colombia in December and is being held without bail. No trial date has been set.Montoya's brother, Eugenio, pleaded guilty in January to trafficking and obstruction of justice charges and agreed to cooperate in the case. He faces up to 30 years in prison. A third Montoya brother also pleaded guilty and is serving U.S. prison time.