Hong Kong yoga ball murders: Malaysian professor wins last-ditch appeal against life sentence for killing wife and daughter

A Malaysian professor has won a last-ditch appeal against a life sentence for killing his wife and daughter with a gas-filled yoga ball 8½ years ago in Hong Kong.

The Court of Final Appeal on Tuesday awarded Khaw Kim Sun another chance to clear his name by ordering a retrial over what prosecutors maintained was a meticulous murder plan by the anaesthesiologist.

Khaw, now aged 59, was found guilty of two counts of murder over the deaths of his wife Wong Siew Fing, 47, and their second child Lily Khaw Li Ling, 16, on May 22, 2015.

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Hong Kong court gives man convicted of yoga ball murders a chance to clear name

The mother and daughter died of carbon monoxide poisoning after a leaking inflatable ball containing a lethal amount of the gas was placed in the boot of their yellow Mini Cooper without anyone noticing.

Khaw, then an associate professor at Chinese University, claimed he had taken the carbon monoxide home to kill rats after a failed experiment on rabbits two days earlier.

Prosecutors argued Khaw, who was at the time having an affair with his assistant, planted the gas-filled ball inside the vehicle to murder his wife, but ended up killing his daughter who had a day off from school as well.

Police display a deflated yoga ball, a plug and a diary belonging to Wong Siew Fing. Photo: David Wong

Defence lawyers suggested the late Lily Khaw might have used the carbon monoxide inside the car as pesticide.

A nine-member jury returned a unanimous guilty verdict on both counts of murder in the 2018 trial, accepting Khaw being the culprit was the only reasonable inference to be drawn based on circumstantial evidence.

The Court of Appeal upheld Khaw’s convictions last year, before a final round of scrutiny at the top court over what appeared to be the trial judge’s mistake in her directions to the jurors.

The Medical Council of Hong Kong deregistered Khaw from both its governing lists of general practitioners and specialists in July 2020.

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