The Luxembourg Public Prosecutor's Office announced on Thursday that there has been progress in an old investigation concerning the death of a 56-year-old woman in Bereldange. The woman was found dead in her bathtub in August 2014.
Her son has now been charged by the investigating judge with parricide and is suspected of having poisoned her. The suspect is former police officer Gilles L., who is already serving a life sentence for the poisoning murders of his sister and her husband. In September 2016, he put cyanide in their aperitif and the pair died shortly afterwards in their apartment in Bereldange.
During his 2020 trial, Gilles L. admitted ordering the poison on the darknet and mixing it into the drinks. However, he maintained that he had not intended to kill his sister and brother-in-law, claiming instead that he had wanted to ruin a holiday from which he had been excluded. He said he had been delivered the wrong poison.
At the time, the Police General Inspectorate Inspection (IGP) took over the investigation because the man himself was a police officer. The prosecutor's office said the judicial investigation was opened in January 2018 after elements emerged during another inquiry and was relaunched in 2025, leading investigators to uncover evidence considered sufficiently serious and consistent to justify charging the woman's son with premeditated parricide by poisoning.
According to the Prosecutor's Office, the case underlines the importance of work on cold cases and unresolved criminal investigations, and demonstrates that the passage of time does not always argue against pursuing further enquiries when questions remain unanswered.
RTL reported from the scene following the discovery in autumn 2016, you can watch the video report below:
In July 2020, the verdict was handed down in the case concerning the deaths of his sister and her husband.
