Pair admit manslaughter after poisoning men in Gloucestershire and Oxfordshire

A woman posed as a sex worker and administered a deadly amount of sedative to two men so that she and an accomplice could steal from them. Adina Mihai, 31, and Madalin Dumitru, 30, admitted the manslaughter of an 80-year-old Gloucestershire man and a 37-year-old from Oxfordshire. They also pleaded guilty at Oxford crown court to two other offences of administering poison to two other men in southern England , who survived. Between August 2024 and July 2025, Mihai and Dumitru, formerly from Ilford in Essex, targeted men who were seeking sexual services in order to steal from them. The pair took financial deposits from the victims before Mihai met them at their homes. Posing as a sex worker, Mihai secretly administered the victims with GBL (gamma-butyrolactone) – a substance that converts into GHB (gamma-hydroxybutyrate) when in the body. GHB is a sedative and sleep-inducing agent. Malcolm King, 80, from a village near Cirencester in Gloucestershire, was found dead at his home on 21 August 2024, and Gary Mouat, 37, at his property in Banbury on 13 July last year. After a postmortem examination, detectives from Thames Valley police’s major crime unit ascertained Mihai had poisoned Mouat with GBL after adding it to an alcoholic drink. Detectives issued a bulletin to all other police forces in the country to share the intelligence in case any other unexplained deaths were linked to the pair. …