A small-town Oklahoma doctor floods her community with a lethal cocktail of drugs, and leaving a trail of victims in her wake.

A modus operandi that mimics natural death works to the advantage of a serial killer who preys on elderly victims, until a sinister clue leads to his capture.

When an elderly care home resident is discovered dead, a murder investigation begins into a nurse at the home, who later becomes a victim of violent attacks.

When a resident dies at a care home in Albany, Western Australia, it's assumed she passed away peacefully. But an autopsy reveals horrific injuries.

At Delmenhorst Hospital, Germany, administrators notice death rates in their intensive care unit have risen sharply. Suspicions fall on Nurse Niels Hogel who turns out to be Germany's most prolific murderer since the Second World War.

A mother of three is shot dead, and investigators soon uncover that she is in the midst of a multi-million dollar divorce.

The suicide of a Maryland beauty queen leaves her loved ones in shock. But when her sister turns detective, she finds evidence that suggests she has not died by her own hand.

When Samira Frasch is found dead at the bottom of the pool, police begin to investigate her podiatrist husband. Did he stage the scene to hide his crime?

A doctor who stood trial for murder after he assisted the death of a terminally ill patient live on TV.

A man is found dead in a San Diego motel, minus his leg. Suspicion soon falls on an underground gender reassignment surgeon.