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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.

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

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

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

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.

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.

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.

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.

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.