In 1968 the death of college sophomore Edson Luís de Lima Souto in a confrontation with a police officer provoked a massive protest (The One Hundred Thousand March) in Rio de Janeiro. The political situation worsened in August, when Congressman Márcio Moreira Alves suggested in a speech that young women should refuse to dance with military cadets in an act of protest against the military regime. The government asked the National Congress to prosecute the deputy. This was too much even for the ARENA-dominated legislature, which turned down the request. Costa e Silva then convened the Council of National Security and enacted the Institutional Act 5. It gave him the power to close Congress or any state legislature, rule by decree, dismiss state governors, and suspend citizens' political rights. It also instituted heavy-handed censorship, abolished habeas corpus for political crimes, and gave the federal government nearly unlimited authority to intervene in state and local affairs. Almost as soon as Costa e Silva signed this decree, he used its provisions to close Congress, as well as the legislatures of all states except São Paulo, and assumed full legislative powers. For all intents and purposes, AI-5 placed Brazil under a tight dictatorship. Congress remained shuttered for the remainder of Costa e Silva's term.