The case centres on an ongoing investigation into suspected illegal immigration and corruption, which has already led to the dismissal of five staff members of the General Department of Immigration.
The public prosecutor's office has confirmed that the investigation has been underway since summer 2023. Authorities estimate that around 200 third-country nationals may have entered Luxembourg illegally using forged documents and subsequently claimed social benefits.
Minister for Home Affairs Léon Gloden has said he was first made aware of the case in April 2025, though the General Department of Immigration itself is understood to have filed initial reports with the police as early as January 2023. Three employees were dismissed by Gloden in April 2025, following a search of the department's premises; one of the three was remanded in custody.
On Tuesday of last week, the public prosecutor's office announced that further searches had been carried out at the General Department of Immigration, the Ministry of Higher Education, several companies, and private residences as part of the wider probe, prompting Gloden to dismiss two additional staff members that same day.
It is against this backdrop that Reiter was questioned as a suspect on Monday.
The information was confirmed by the Greens MP Meris Sehovic following a meeting of the relevant parliamentary committee: "One piece of information we received is that the director of Immigration was also questioned as a suspect in this affair."
"What we were told this morning is that the first anonymous letter, from January 2023, was addressed to the director, and that it was the director himself who then filed the first complaint," Sehovic said. There were, it appears, two anonymous letters: one addressed to the director at the end of 2022 or the start of 2023, and another in spring last year, 2025.
After the meeting, Interior Minister Léon Gloden clarified: "That one is dated 31 March, sent by a so-called group of journalists, though it wasn't signed, giving an address on Rue d'Arlon. I received it on 1 April. We then reported it to the public prosecutor's office immediately, and a search was carried out straight away."
Asked why he had been alerted by an anonymous letter rather than by his own officials, the minister explained: "We genuinely didn't know either, and this has been clearly stated here by officials too. We still don't fully know the scale of this affair today. It was always assumed that we were a small part of something bigger. That's also what Mr Reiter made clear here: he too had been told that we were a small part of a much larger affair. That's why it didn't particularly surprise me."
Another point Minister Gloden reportedly stressed, according to Sehovic, was "that one of the three state agents charged assumes two of them fall under his responsibility, while for the third he doesn't know whether that person is an agent from his ministry or from another one."
The Ministry of Higher Education, where searches had also taken place last week, stated on the same day as the prosecutor's announcement that none of its staff had been charged. At that point, the total stood at 25 people charged. Since then, however, three further individuals have been brought before investigating judges and charged. The Ministry of Higher Education confirmed to RTL on Tuesday, upon request, that none of its staff members have been charged.
