He was manager of the newspaper La Tribuna since 1954, and from there also he fought, with its director Arturo Schaerer, denouncing abuses and crimes of the dictatorship and the breakdown of rule of law that began with Higinio Morínigo and continued with Alfredo Stroessner.
In November 1956 the government intervened brutally in La Tribuna, with Ruiz A. arrested, tortured and then abandoned in a boat on the shores of Clorinda, Argentina.
[clarification needed] On May 15, 1972, Arturo Schaerer was succeeded by Carlos Ruiz Apezteguia in the direction of the newspaper.
During his direction, he denounced abuses in the negotiations of the Treaty of Itaipu and Yacyreta, with Brazil and Argentina respectively on the construction of the hydroelectric dams.
He continued frontal and acid criticism to the dictatorial government, embodied in a memorable manifesto he wrote called "Put the Moral into fashion".