1. The Deadly Injection

Nurse Marie Whiston claimed her husband died naturally while in her care. An autopsy revealed lethal insulin - she used her medical expertise to murder him.

2. Killed by Control

Katie Wilding sought romance but found abuse. Her death was ruled as an overdose, but her family wanted justice.

3. The Evil Price of Freedom

Faria Khan hated her husband, Nawajid. Instead of divorce, she hired a group to execute a calculated, cold-blooded murder plot.

4. Silent Weapon

Nurse Victorino Chua betrayed his oath, secretly poisoning hospital patients in Greater Manchester by contaminating saline drips with lethal insulin.

5. Sister's Deadly Warning

Kylie Dembrey from Berkshire fell for Mark Sinclair, unaware his charm hid a violent abuser. She kept the years of abuse secret, until he tragically murdered her.

6. An Evil Education

Kylie Dembrey from Berkshire fell for Mark Sinclair, unaware his charm hid a violent abuser. She kept the years of abuse secret, until he tragically murdered her.

7. A Dose of Death

Nurse Beverley Allitt, the "Angel of Death," murdered four children and harmed nine others at Grantham Hospital in 1991, driven by a desperate need for attention.

8. Til Death Do Us Part

Dawn Walker's hope for a happy marriage ended on her wedding night when Thomas Nutt murdered her in West Yorkshire. He hid her body in a suitcase, then faked a search.

9. Entitled to Kill

Spoiled Elliot Turner, enraged when Emily Longley rejected him, murdered her in 2011 in Dorset. The investigation imprisoned Turner and convicted his parents for the cover up.