An example of this would be the murder of Leon Trotsky in Mexico in 1940, whose organization was in charge of Codovilla, who at this point enjoyed the confidence of the leadership of the CPSU. As a result of the workers' mobilizations of October 17, 1945 against the dismissal and detention of Juan Domingo Perón, within the party there were questions to the political line of the same and to the leadership headed by Codovilla and in the National Conference of December of that year, Rodolfo Puiggrós openly expressed criticism and demanded to find practical agreements with Perón around the defense of the interests of the workers and the fight against imperialism. In the elections of 1946 the Communist Party was part of the Democratic Union, opposed to Peronism. Puiggrós was expelled in 1947 and founded the Communist Workers Movement together with some communist syndicalists supporters of the alliance with Peronism. The student of chemistry and communist militant Ernesto Mario Bravo was kidnapped at his home on June 17, 1951 and tortured by the police. His case was reported by the doctor who treated him, first in the Special Section and then in a fifth where he was transferred. The government, however, emphatically denied the facts:  On June 17, 1955, the police of Rosario arrested, tortured and disappeared Juan Ingallinella, a doctor and party leader, who had participated in the publication of pamphlets in defense of the government days before, denouncing the masterminds of the bombing and strafing of the Plaza de Mayo, in which more than 350 people were killed and more than 700 wounded and mutilated. After the overthrow of Perón, the party criticized the loss of democratic liberties and the prohibition of the partisans who carried out the coup of 1955. Although Peronism was the main objective of the persecutions, the increase of the repression in the government Arambruru also led him to repress the members of the Communist Party. In 1956 the Ministry of the Interior, Eduardo Busso, denounced that the Union of Argentine Women and the Argentine League for Human Rights had links with the party. In April of the following year, the cancellation of legal status was announced and 360 militants were arrested and 56 local supporters closed. Adhered to the thesis of the XX Congress of the CPSU, which postulated the peaceful transition to socialism through the electoral route, among other points. In 1967 it underwent the biggest organized split in its history, which would lead to 4,000 members to separate, later forming the Revolutionary Communist Party, on January 6, 1968.