Amid rising debts, divorce and substance abuse, Martin Ruddy had his eye on his parents' inheritance and lashed out to get it.

During a drunken argument, violent alcoholic Philip Middleton killed his parents with a granite block in a heartless attack.

A man who had shown a disposition to violence even as a child, Anmol Chana's troubling behaviour exploded in the worst possible way.

After his parents criticised him for his idle behaviour, Daniel Dighton stabbed them both to death before blaming his crime on a hangover.

Blackwell killed his parents in their home by bludgeoning them with a claw hammer and stabbing them repeatedly with a carving knife.

With a thirst for blood and a knife obsession, Michael Clarke believed it was his destiny to kill, and his parents were the victims.

A case that shocked Jersey to its core, the disappearance of Nicholas and Elizabeth Newall would lead to a murder mystery of unimaginable consequence.

After trying to kill his parents in a fake crash, Stephen Seddon was hailed a hero for saving them. But his evil intentions hadn't gone anywhere.