Adina Mihai

Adina Mihai, 31, has been involved in a significant criminal case in the UK, culminating in her pleading guilty to manslaughter and administering poison in June 2026.

Key Facts and Proceedings:

• Nature of Crimes: Between August 2024 and July 2025, Mihai, in collaboration with Madalin Dumitru, 30, targeted men seeking sexual services. Mihai would arrange to meet victims at their homes after financial deposits were taken. She would then secretly administer gamma-butyrolactone (GBL), a substance that converts to GHB (a sedative), into their drinks to incapacitate them, allowing her and Dumitru to steal their property.
• Victims: The scheme resulted in the deaths of two men: Malcolm King, 80, in Bagendon, Gloucestershire, and Gary Mouat, 37, in Banbury, Oxfordshire. Two other men also survived being poisoned by the pair.
• Malcolm King was found dead on August 21, 2024. His death was initially considered non-suspicious due to a pre-existing health condition but was later linked to the poisonings through forensic investigation.
• Gary Mouat was found dead at his property on July 13, 2025 (some sources state July 12 or 30, 2025).
• Arrest and Initial Charges: Mihai and Dumitru were arrested on July 31, 2025. They were initially charged with murder, administering poison, and conspiracy to steal, pleading not guilty to murder in April 2026.
• Court Appearances and Decisions:
• On April 24, 2026, Mihai and Dumitru appeared at Oxford Crown Court and pleaded not guilty to a total of 19 charges, including murder.
• On June 24, 2026, at Oxford Crown Court, Adina Mihai (31) and Madalin Dumitru (30) pleaded guilty to two counts of manslaughter and two counts of administering poison.
• Sentencing: The judge, Mrs Justice Brunner KC, indicated that Mihai and Dumitru would receive "substantial sentences of imprisonment." Sentencing is expected to take place in late July or early August 2026 at Oxford Crown Court.
• Police Investigation: The case involved a complex and resource-intensive joint investigation by Thames Valley Police and Gloucestershire Constabulary.