Judicial investigations involving Spain’s Guardia Civil and the Sociedad Estatal de Participaciones Industriales (SEPI) have intensified scrutiny of how public officials respond to legal challenges. The proceedings have renewed debate over the distinction between criminal responsibility and political accountability, particularly when high-profile figures are summoned as persons under investigation. The presumption of innocence remains a legal principle. Political parties and officials face a separate question: whether continued service is compatible with public confidence.
The Guardia Civil inquiry, led by National Court judge Santiago Pedraz, examines alleged pressure on law-enforcement officials and possible obstruction of judicial investigations. Investigators are examining whether a network associated with former PSOE activist Leire Díez sought compromising information about judges and prosecutors, as well as Guardia Civil investigators. The reported aim was to discredit investigators and witnesses and disrupt politically sensitive proceedings. The inquiry has reportedly included contacts involving Díez and businessman Javier Pérez Dolset, along with former judge Luis José Sáenz de Tejada and former PSOE organisational secretary Santos Cerdán.
Mercedes González, the former director general of the Guardia Civil, was summoned by Pedraz as a person under investigation. The inquiry is examining her meetings and communications with Díez, as well as alleged attempts to influence or undermine investigations involving the Guardia Civil’s Central Operative Unit (UCO). UCO reporting has documented encounters between the two, including a meeting at González’s official office in November 2024. The meetings’ content and purpose remain basic to the competing accounts before investigators. González has denied participating in any operation to halt judicial proceedings and said she considers herself a victim of the conduct under investigation.
Investigators have also identified at least 39 meetings between Díez and Cerdán, 22 of them at the PSOE’s federal headquarters on Ferraz Street. A judicial assessment described the encounters as potentially involving coordination and reporting on Díez’s activities. The investigation reportedly covers alleged administrative prevarication and obstruction of justice, along with communications between González and Díez. Reporting says González initially denied some meetings, then later acknowledged them and said she had informed Guardia Civil leadership. Former UCO chiefs disputed that account before the judge. Investigators have also examined the alleged deletion of messages between González and Díez.
Díez has rejected the UCO’s account and denied the basic allegations. She has said nobody in the PSOE instructed her to act against Judge Biedma, and characterised her meeting with former judge Sáenz de Tejada as journalistic work. Biedma has described the distress caused by alleged pursuit connected with Sáenz de Tejada, whom the UCO links to the suspected network. Díez has called the UCO report false. These assertions and denials form part of the sharply conflicting accounts being assessed in the proceedings.
The SEPI-related strand has widened the controversy beyond the Guardia Civil inquiry. Reporting has linked Díez with former SEPI president Vicente Fernández and Antxon Alonso, a business associate of Cerdán in Servinabar, through a group referred to as Hirurok. Investigators are reportedly examining at least five public-sector contracts with a combined value of €133 million, involving public bodies and companies connected with SEPI. Separately, Teresa Castillo, director of Corporate Development at the public company Isdefe, resigned after being cited as a suspect, information from reporting on her departure.
The political consequences have extended beyond the courtroom. Reporting says Prime Minister and PSOE leader Pedro Sánchez removed González and Cristina Narbona from PSOE candidate lists after the Díez controversy. González had been appointed director general of the Guardia Civil in March 2023. The episode has intensified scrutiny of her changing explanations about contacts with Díez and whether senior officials were informed. Political repercussions, but, are distinct from a final criminal judgment. An investigation does not itself establish guilt.
The debate over resignations turns on two questions that should not be conflated: the legal rights of people under investigation and the standards of political responsibility expected of officeholders. Spain’s presumption-of-innocence protections govern criminal proceedings, while parties and public institutions must also consider whether continued service affects their credibility and ability to function effectively. Even when an investigation ends without a conviction, reputational consequences can endure.
The Guardia Civil is a national law-enforcement agency responsible for public security and criminal investigations. SEPI is a state holding company with interests in public enterprises, making its associated contracts and corporate relationships a matter of public scrutiny. The cases have sharpened calls for consistent standards of transparency and conduct across political parties and public bodies, especially when allegations involve investigators, judicial witnesses or the management of public resources.
