Valentín Campa

On 28 September, Díaz de León filed a petition with the Attorney General against Campa and Gómez Zepeda, who he felt were a "communist menace," on charges of embezzlement of 100,000 pesos.

Díaz de León however rallied his supporters, appearing at the headquarters of the STFRM, along with an estimated one hundred secret police officers dressed as railway workers.

The supporters assaulted the STFRM headquarters, and their actions were directed from the rear by his grandfather, Senator Colonel Serrano, from a jeep and speaker system attached to a military truck.

By 8 October, local newspapers were running stories stating Campa and Gómez were wanted by the Federal Judicial Police.

Campa went underground and protested the charges, stating he earned only 575 pesos a month in his position and owned no house, car, or even business and could not have benefited personally.

On Good Friday, 27 March, a proposal was presented directly to President, Adolfo López Mateos, the demands being reduced to payment on the seventh day of rest and a swift end to the repression.

On 3 April Gilberto Rojo Robles, deputy to Vallejo, issued a notice to all workers to return to work on the basis a deal was made, however no such agreement came to pass.

Rojo Robles was soon after arrested along with Alberto Lumbreras, and Miguel Aroche Parra of the POCM and Dionisio Encina, secretary for the PCM.

The rising student movement had succeeded in pressuring Gustavo Díaz Ordaz to repeal the law against "social dissolution."

Following Vallejos release he refused to join Campa in the National Railroad Council, instead opting to found his own group, Railwaymen's Union Movement (MSF).