After trying to kill his parents in a fake car crash, Stephen Seddon found himself hailed a hero for saving them from drowning, but the would-be murderer's second attempt proved fatal.

A case that shocked Jersey to its core, the disappearance of Nicholas and Elizabeth Newall from their home in 1987 would lead to a murder mystery of unimaginable consequences for their family.

With a thirst for blood and a deeply-held knife obsession, Michael Clarke believed it was his destiny to kill, and his parents ended up being the victims of his urge to take human life.

Indulging himself and his girlfriend in unaffordable luxury, Brian Blackwell murdered his parents in 2004 and went on another spending spree before a police investigation exposed his crimes.

When his teacher parents criticised him for his idle behaviour, Daniel Dighton stabbed the couple to death in the family home before blaming the frenzied attack on a hangover.

Experts profile the life of Anmol Chana, a man who had shown a disposition towards violence even as a child but whose troubling behaviour ended up exploding in the worst possible way.