On December 20, 1985, the charges were laid out in an Associated Press article after an extensive investigation which included interviews with "officials from the Drug Enforcement Administration (DEA), Customs Service, Federal Bureau of Investigation (FBI) and Costa Rica's Public Security Ministry, as well as rebels and Americans who work with them." Five American Contra supporters who worked with the rebels confirmed the charges, noting that "two Cuban-Americans used armed rebel troops to guard cocaine at clandestine airfields in northern Costa Rica. They identified the Cuban-Americans as members of the 2506 Brigade, an anti-Castro group that participated in the 1961 Bay of Pigs attack on Cuba. Several also said they supplied information about the smuggling to U.S. investigators." One of the Americans "said that in one ongoing operation, the cocaine is unloaded from planes at rebel airstrips and taken to an Atlantic coast port where it is concealed on shrimp boats that are later unloaded in the Miami area."