A look at some of Europe's and America's most horrific serial killers and how bizarrely simple blunders eventually brought them to justice.
Bala: The Novel Killer
Kot: The Vampire of Krakow
Kroll: The Duisburg Cannibal
Honka: The Ripper of St Pauli
Tuchlin: The Scorpion
Onoprienko: The Terminator
I Survived a Crime
Lo que la verdad esconde: Caso Asunta
Still a Mystery
The Wonderland Massacre & the Secret History of Hollywood
Desperately Seeking Soulmate: Escaping Twin Flames Universe
Murder for Hire
Two Shallow Graves
Keep Sweet: Pray and Obey
Devil in the Web
Deadly Cults
The Alcàsser Murders
Murder Loves Company
Cold Justice
Constructing Australia
Mind Over Murder
Moment of Truth
Vengeance: Killer Besties
Real Life Nightmare
The Truth About My Murder
The Real Murders of Los Angeles