On OCTOBER 6th, 1949, Marie Raven gave birth to her first child, and the next day her husband Daniel Raven, a 23-year-old advertising agent, went with her parents, Leopold and Esther Goodman, to visit her at the nursing home in Muswell Hill.

They left her bedside shortly before 9 p.m., and after they arrived at the Goodmans’ home in Ashcombe Gardens, Edgware, Raven battered his in-laws to death with the solid base of a TV aerial.

He then drove to his own house in nearby Edgwarebury Lane, where he tried to remove bloodstains from his suit. The attempt was unsuccessful, so he stuffed the suit into the kitchen coke boiler.

The Goodmans’ bodies were soon discovered, and when a police officer called at Raven’s house he noticed a smell of burning cloth coming from the kitchen. He doused the fire and retrieved the half-burned suit, its bloodstains still visible. They were found to be of the same rare blood group as Mr. Goodman’s, and Raven was arrested and charged with the murders.

At his Old Bailey trial he said he had called at the Goodmans’ house that night but received no answer to his knocks. He became concerned, climbed in through an open window, found the bodies, and that was how the blood got on to his suit. When he returned home he panicked and decided to burn the suit because he felt sure the police would blame him for the murders.

The jury didn’t believe him, and he was found guilty and sentenced to death.

Insanity had not been an issue at the trial, but when Raven’s appeal was heard he was said to have been discharged from the RAF because of “severe anxiety neurosis” following an aeroplane crash in which he was the only survivor.

A doctor who treated him told the court that Raven suffered blackouts and brainstorms, and another physician said he thought Raven was suffering from idiopathic epilepsy.

But the appeal was dismissed, and Raven was hanged on January 6th, 1950. His motive for the murders remains a mystery.