Overview
- A jury court in Mont-de-Marsan found the 53-year-old guilty and set a 30-year sentence with at least 20 years to be served.
- Investigators concluded the teen died in 2019 from an overdose of a heart‑rhythm‑slowing drug equivalent to up to 75 tablets, later found hidden in the mother's bedroom.
- Forensic experts detected nearly two dozen substances in the deceased and signs of substantial cannabis use, following months of heavy prescribing and visits to about 30 doctors.
- Tests found traces of medications not prescribed to the younger sister.
- The court also convicted the mother of attempting to have her ex-husband killed, while she maintained the death was a suicide and family members offered conflicting accounts.