 Castillo become of good form the Campeonato Carioca, saving a penalty to Victor Hugo of Friburguense in the 4–1 win of Botafogo, in the first official game of "The wall" for that tournament.Due to his good performances for the Carioca against Flamengo and Fluminense, the biggest rivals of Botafogo, he came to be idolized by the club's fans.In April 2008, he won the Taça Rio, after a 1–0 victory over Fluminense with a goal of Renato Silva in the 84th minute, being this his first title in an international league.