When FARC and the Colombian government began negotiations in 2012 to end 52 years of war, the two sides looked to Cuba.
Questions remain about whether the state will follow through on its commitments.
Miguel Ángel Beltrán, a sociology professor at Colombia's National University, is being held in maximum security at a prison in Bogota.
There are now "agreements" on agrarian rights, illegal drugs, political participation, and victims.
President Maduro's socialist government is under siege from business-oriented right-wingers; voting on December 6 for National Assembly delegates will be a test of strength.
An inquiry in the context of the peace negotiations between the government and the FARC-EP guerrillas by a former political prisoner.
Colombian President Juan Manuel Santos announced a halt to peace talks in Havana between his government and the Revolutionary Armed Forces of Colombia.
Venezuelan National Assembly deputy Robert Serra and companion María Herrera were murdered on October 1 in Caracas.
Ravelo led the fight in Barrancabermeja, his home city, against right-wing paramilitary domination.
After reaching partial agreements on agrarian reform and political participation, negotiators tackled drug trafficking. But after five months of discussion, they recessed without an agreement.