Six people were named in a federal grand jury indictment unsealed Monday in Tucson, all accused of involvement in the December 2010 killing of Border Patrol Agent Brian Terry in southern Arizona.
A $1-million reward was also announced to help track down four fugitives in the case.
Federal authorities obtained the indictment in November, but unsealed it Monday after they were unable to locate the four who remain at-large.
Terry's shooting death revealed the secret federal Bureau of Alcohol, Tobacco, Firearms and Explosivesprogram called Fast and Furious. Under the program, federal law enforcement officials allowed about 2,500 illegal gun purchases along the border in the hope that it would lead them to violent Mexican drug cartels. Instead, most of the weapons were lost, and two were recovered at the scene of Terry's death south of Tucson.
The indictment alleges that the defendants were part of a "rip-off crew" of bandits preying on Mexican drug couriers on this side of the border. Terry and fellow Border Patrol agents came upon the bandits Dec. 14, 2010, and he was fatally shot in a firefight.