[5] After the re-democratization of the country at the end of World War II, the brothers joined the Social Democratic Party and Silvestre Péricles was elected federal deputy in 1945 and governor of Alagoas in 1947.

[7] He returned to politics in 1958, when he was elected senator for the Social Labour Party[8] and from then on his rivalry with Arnon de Melo intensified to the point where the two engaged in gunfire in the middle of the Federal Senate: after an exchange of accusations and insults, the rivals were both attending the December 4, 1963 session when at different moments they drew their weapons in the session.

Prevented from hitting Melo by the intervention of Senator João Agripino [pt], Silvestre Péricles took cover under the bench and witnessed his enemy's retaliation, who, in an attempt to shoot him, hit and killed José Kairala,[9] but because of his parliamentary immunity, Arnon de Melo received no punishment.

Alongside the situations described above, Silvestre Péricles migrated to the Christian Democratic Party and was defeated in the election for the government of Alagoas in 1960.

After him, the city of São Luís do Quitunde still achieved two state governors: Lamenha Filho [pt] and Divaldo Suruagy.