Besançon poisonings

Frédéric Péchier
Born (1972-01-22) 22 January 1972
CitizenshipFrench
OccupationAnesthesiologist
Criminal statusConvicted; imprisoned; appeal planned
MotiveTo intervene in emergencies and appear heroic; to discredit colleagues and feed thirst for power
Convictions30 counts of intentional poisoning
Criminal chargeIntentional poisoning
PenaltyLife imprisonment with 22-year minimum term
Details
Victims30
Span of crimes
2008–2017
CountryFrance
LocationsSaint-Vincent clinic and Franche-Comté Polyclinic, Besançon
Killed12
Injured18 (serious complications)
WeaponsContamination of anesthetic infusion bags with overdoses of potassium, local anesthetics (e.g., mepivacaine), adrenaline, or heparin
Date apprehended
2017 (initial indictment)
Imprisoned at18 December 2025

The Besançon poisonings was a French legal case resulting in the conviction of French anesthesiologist Frédéric Péchier to a life sentence for intentionally poisoning 30 patients and killing 12.

The poisonings took place in Besançon between 2008 and 2017. A renowned physician in his field, Péchier was found guilty of deliberately inducing cardiac arrest or serious complications in surgical patients by manipulating anesthetic infusion bags in order to position himself to intervene and appear as a savior, known in criminology as an angel of mercy.

The case broke in 2017 when several unusual medical incidents raised alarms. An initial indictment was issued in 2017, expanded in 2019 and then in 2022, covering a total of thirty cases, including twelve fatalities. Péchier maintains his innocence and denounces a lack of direct material evidence. The complex and highly publicized investigation involves medical experts and investigators to determine the practitioner's responsibility.