A small hospital in Chillicothe, Ohio, sees 18 code blue emergencies and nine suspicious deaths, leading to a decades-long criminal investigation.

A nurse in a doctor's white coat is linked to mysterious patient deaths at a medical centre, but even his shock confession can't bring him to justice.

Death rate triples on a hospital ward linked to nurse Kristen Gilbert. Could this seemingly typical 'soccer mom' really be a killer?

On a November evening, a woman calls 911 for her husband Greg after finding him unresponsive and, bizarrely, covered in rose petals. Is it murder?

A Newcastle care home loses two residents in two days due to a nurse's disdain for the elderly and a history of pathological lying.

A mother dies after a facelift. Her daughters suspect their father, and doctor, of having a role in her unexpected death.

Two double murders five years apart take place in Omaha, Nebraska. Could a doctor connected to the victims, fuelled by rage and revenge, be to blame?

A hospital in Indiana sees a death rate triple in a year thanks to nurse Orville Lynn Majors, who could have been behind as many as 100 deaths.

Eleven elderly residents of a Sydney care home die in a fire and Nurse Roger Dean's role in the tragedy goes beyond mere assistance.

Examining the crimes of charming doctor, Dr Michael Swango, who was a fraud and murderer, believed to have left dozens of victims in the US and Africa.

Gail Katz's family thought her disappearance was solved when a torso washes up, but the truth unfolds thousands of feet above the ocean.

A shocking double murder plot revealed after decades turns out to be a tale of sex, religion and greed, that deeply affected the Irish community.

A rising pop star, Selena Quintanilla, is gunned down by her fan-turned-manager, Yolanda Saldivar. What led to this tragic betrayal?