At 5 a.m. on Wednesday, the sun had yet to peek through the jungle canopy in this country's Guaviare Department when the guerrillas told their captives to gather their belongings. A call had come in from a top adviser to Alfonso Cano, their new supreme commander. He said to move. Immediately. Or so the guerrillas thought. In fact, the gravelly voice that sounded so full of authority belonged not to Cano, a grizzled leader of Latin America's most feared insurgent group, the Revolutionary Armed Forces of Colombia, or FARC, but rather to a government officer. The Guardian: Colombia hostage rescue: 'Like a movie' - the double cross that freed Betancourt.