[1][2] Castro is a Defense lawyer who studied Law and Criminal science at the University of Costa Rica and has a Doctorate degree in Mediation from Universidad La Salle.

He became the first cabinet member to receive a Motion of no confidence by the Legislative Assembly[3] when he summoned police forces to fence off Parliament as a means to press for the reform of the Penal Code.

[15] In the July 30, 2019 editorial of the newspaper La Nación, Castro was accused of anti-Semitism for comments made in one of his official videos against the owner of the media CRHoy Leonel Baruch who is Jewish, making allusions and jokes about the Holocaust and also calling him an "evil banker.

[21] On December 1, 2017, journalist David Delgado, who worked at La Nación and the Ministry of Justice and Peace, publicly denounced him for "persecution, mockery and harassment" in relation to coverage of a drug trafficking case.

[1] On December 11, 2017, he announced that he would sue the University of Costa Rica because a Facebook program of several young students reported the assault on his mother, his past as a politician and criticized what qualified his "right-wing populist" tendencies.