Overview
- The chambre de l'instruction of the Dijon court found on Wednesday, July 15, 2026 that the conduct alleged against 81‑year‑old Jacqueline Jacob was of a délits nature with a three‑year prescription, which makes her October 24, 2025 mise en examen legally void.
- Jacob had been placed under formal investigation in October 2025 after a 2021 Swiss stylometry report attributed a key 1984 anonymous letter and earlier threatening notes to her, an expertise that reopened the long‑running inquiry.
- Grégory’s parents chose not to appeal the July 15 ruling to the Court of Cassation and said they will wait for the results of pending DNA and stylometric expert analyses before seeking any renewed charges not covered by prescription.
- Prosecutors say the probe is not closed because unidentified DNA traces from the 1984 scene remain and they may consider genetic genealogy if technical and legal conditions allow and the traces are usable.
- The case has been marked by repeated procedural errors, prior annulments and family feuds that have shaped the investigation for four decades and left relatives and investigators reliant on new forensic methods to move the inquiry forward.