A picture book wedding on the beach in Malibu, California, created the facade of a perfect blended family.

But Fred Roehler, a charismatic and seemingly loving father and husband, shocked his community when he was accused of drowning his wife and young stepson in a staged boating accident.

BBC journalists who were friends believed Roehler was the victim of a wrongful prosecution.

But their investigation uncovers chilling details of greed, deception, and murder-for-profit.