Beverley Allitt poisoned a string of young patients during the 1990s.

Ben Geen from Oxfordshire adminstered patients with lethal doses of drugs while on duty.

Genene Jones worked in the paediatric intensive care unit of a Texas hospital.

Police were called in after a suspicious number of patients died while in Daniela Poggiali's care.

German nurse Stephan Letter was tried over the murders of 29 patients, later stating that he acted to spare their suffering.

Dialysis nurse Kimberley Clark Saenz poisoned patients by injecting bleach into their bloodstream.

Real crime. Chilling series looking at nurses who kill their patients. Niels H adminstered lethal doses of drugs to patients in order to later 'show off' his resuscitation skills.

Real crime. Chilling series looking at nurses who kill their patients. Colin Norris targeted elderly patients by adminstering them unnecessary doses of insulin.

Real crime. Grisly tales of nurses who go on to kill their patients. Victorino Chua was sentenced to life in prison after poisoning countless patients at a Manchester hospital.

New Jersey nurse Charles Cullen's victim count is believed to total as many as 300 people.