An Italian nurse, Daniela Poggiali, accused of killing 38 several terminally ill patients whilst they were under her care has been arrested.
She was working at the Lugo hospital in Ravenna province, northern Italy, and accused of administering massive doses of potassium chloride, according to prosecutors.
Mancini said he had ruled out the possibility that Poggiali injected the patients on humanitarian grounds as a form of euthanasia.
The case came to light after health care staff noticed a statistically abnormal number of deaths were connected to Poggiali.
Andrea Des Dorides, the general director of Ravenna province health care, reported the suspicions to the prosecutor’s office, and an investigation was launched in April.
An in-depth forensic analysis of the body of a 78-year-old woman, Rosa Calderoni, found a large amount of potassium chloride, with no trace of the substance in her intravenous drip.
Prosecutors said this was clear evidence that the chemical had been injected intentionally, directly into Calderoni’s body.
Prosecutors are investigating whether Poggiali could be responsible for the deaths of up to 38 people.
Poggiali has denied any wrong doing.