A NURSE at Huelva prison was released after questioning but is under investigation for allegedly poisoning six colleagues.
The members of the prison’s medical team were affected by methadone last November although police investigators have since found evidence of three similar cases that went unnoticed at the time.
Police are working on the theory that the poisonings were prompted by the nurse’s professional jealousy towards a colleague who occupied a post she aspired to.
The case came to light after six members of the medical staff began to feel “weak and dizzy” according to sources close to the case.
Analyses revealed traces of methadone, which is used to treat withdrawal symptoms in drug addicts and is prescribed under strict medical supervision to prisoners.
The nurse, who worked for at least 15 years in Huelva prison had access to the hospital pharmacy and is thought to have used the methadone to lace a carton of milk that she knew her colleagues would be using.
Although the poisoning was not life threatening, all had to spend several days in hospital.
The nurse, who has been on sick leave since last December, is accused of causing bodily harm and endangering the public health and must report at fortnightly intervals to the local court.