President Hugo Chvez of Venezuela has been caught. Despite his protestations of innocence, Interpol has corroborated the authenticity of thousands of computer files captured during a Colombian Army raid on a FARC rebel camp in Venezuela. Only a small share of this trove has been released, but it leaves little doubt that Venezuela has been aiding the guerrillas effort to overthrow Colombias democratically elected government.
The Colombian government released documents from the computers that suggest Venezuelan intelligence officials tried to secure weapons for the FARC and that Mr. Chvezs government offered the rebels oil and a $250 million loan. Information in the files has already led to the seizure of FARC funds in Costa Rica.
Colombia can now take the issue to the Organization of American States, the United Nations Security Council or the International Court of Justice. But it might need further corroborating evidence, as Interpol only certified that the Colombian government did not tamper with the files but said nothing about the veracity of their content.
Mr. Chvez has a more important choice to make: he can sink once and for all into the role of regional pariah, to be contained or isolated in the name of regional stability, or he can commit to becoming a responsible neighbor. All of his neighbors, and all Venezuelans, should urge him to choose the latter course.
Responsibility means that Mr. Chvez must halt all aid to the FARC which long ago chose drug trafficking over political liberation and use his influence to get the rebels to lay down their arms and join the demobilization process that is under way for Colombias right-wing paramilitary groups.
Mr. Chvezs posturing as a populist liberator is wearing thin at home, where voters defeated his proposal to overhaul the Constitution so he could stay in power indefinitely. It is also wearing thin abroad, where Mr. Chvez has used Venezuelas oil riches to meddle in Argentina, Bolivia and Nicaragua, among others.
Latin Americas leaders need to realize that his actions threaten the stability of the entire region and that cheap oil does not lessen that threat. They need to remind Mr. Chvez of the commitment to nonintervention and democratic rule in the Organization of American States charter. And they need to make clear that he has only two possible moves from here: he can become a responsible neighbor or be ostracized in the hemisphere.