A letter bomb that ended up being opened not by its addressee, but by his assistant. Lyda Monteiro de Carvalho, better known as dona Lyda, was the longest-serving employee of the Brazilian Bar Association (OAB) and secretary to the entity's then president in Rio de Janeiro, Eduardo Seabra Fagundes. She died on August 27, 1980, while opening the envelope addressed to her boss, at the headquarters of the OAB's Federal Council, in Downtown Rio.
At the time, the OAB was a space of resistance and opposition to the Dictatorship. It denounced disappearances and torture of political prisoners, working in defense of human rights and the restoration of democratic freedoms. It was only 35 years after the attack that dona Lyda's family was able to learn the names of the perpetrators of the crime, thanks to the work of the State Truth Commission. The military agents involved in the action against the OAB are the same ones involved in the failed bomb attack that occurred on May 1st of the following year, in the Riocentro parking lot.