Émilie, a 33-year-old laboratory technician, died in June 2018 from Creutzfeldt-Jakob disease, the human variant of so-called mad cow disease. Her family has now lodged an official complaint of manslaughter and endangering lives against France's national agricultural research institute, INRA, where the young woman was working when she contracted the disease. The evidence suggests that there were health and safety failings on the part of this prestigious institute. Meanwhile the Ministry of Education, which oversees the research body, has launched an investigation. Pascale Pascariello reports.