On September 8, 1977, about a year and a half after the coup d'état that started the dictatorship of the National Reorganization Process, Bravo was kidnapped by a government task force while he was teaching.
Bravo recognized Buenos Aires Provincial Police officer Miguel Etchecolatz and General Ramón Camps as his torturers.
President Raúl Alfonsín, who was elected democratically in 1983 and ordered the trial of the dictatorship's leaders, appointed him Subsecretary of State in the area of Education; however, Bravo resigned after the passing of the Full Stop Law and the Due Obedience Law, which halted judicial procedures on many people involved in the crimes of the dictatorial period.
He became a personal friend of his fellow Deputy Elisa Carrió, founder of ARI (although the relationship would deteriorate in the following years, culminating in an acrimonious split in 2002), and participated in the Alliance for Work, Justice and Education, which brought Fernando de la Rúa to the presidency in the 1999 elections, though he later distanced himself from de la Rúa's austerity policies.
In 2001 he ran for senator representing the City of Buenos Aires and obtained enough votes to win a seat, but a legal conflict led to the assumption of Gustavo Béliz instead.