Frédéric Péchier, a former anaesthetist in Besançon, France, is on trial for allegedly poisoning 30 people, resulting in 12 deaths. He has been under investigation since 2015 and claims there is no proof against him. The trial involves over 150 civil parties and will last more than three months. Allegations began in 2017 after a patient experienced a cardiac arrest post-surgery. Prosecutors allege he tampered with medications to induce cardiac arrests as revenge against colleagues. If convicted, he faces life imprisonment.