The implications of the investigation into the case, initially named Koldo, then later Ábalos and finally Cerdán, extend beyond its three protagonists. In addition to the main branch of the Supreme Court, the case has another, secondary branch, in the National Court, focusing on two former senior officials linked to the Ministry of Transport, headed by José Luis Ábalos, who allegedly assisted the ringleaders in obtaining payment from the companies. These are the former president of Adif, Isabel Pardo de Vera, and the former Director of Highways, Javier Herrero, who testified this Monday as suspects before National Court Judge Ismael Moreno. After the interrogations, which lasted approximately one hour each and were conducted consecutively, Moreno concluded that there are "sufficient grounds" to charge them with the crimes of organized crime, bribery, and influence peddling. In response to this, the judge has ordered their passports to be revoked and their departure from Spain prohibited, as requested by the Anti-Corruption Prosecutor's Office.

The National Court has taken action and summoned former Adif president Isabel Pardo de Vera and former Director General of Highways Javier Herrero as suspects in the Koldo case. They are due to testify on July 21 at 11:00 a.m. after the Supreme Court found evidence of their involvement in the alleged scheme of irregular awarding contracts, according to a ruling by Judge Ismael Moreno.