A doctor in Hong Kong has been accused of gassing his wife and daughter to death with a yoga ball filled with carbon monoxide.
Khaw Kim-sun, an anesthesiologist from Malaysia, allegedly stuffed the gas-filled yoga ball in the trunk of his wife's car in May 2015, the South China Morning Post reported.
He is pictured in the photo below:
His daughter is pictured here:
The wife, Wong Siew-fung, and the couple's 16-year-old daughter Khaw Li-ling were found unconscious one hour after leaving their home in the Mini Cooper that day, the Associated Press reported.
They were later declared dead by carbon monoxide poisoning at a nearby hospital, where Khaw previously worked. Postmortems revealed that the mother and daughter had 50 times the normal amount of carbon monoxide in their blood, the Post reported.
The car showed no defects, the AP said, and therefore was unlikely to have produced the carbon monoxide itself.
Police also found a deflated yoga ball in Wong's car, Hong Kong's Apple Daily newspaper reported. You can see it around the 1:15 in the video below, which was published by Hong Kong's ONTV network:
Khaw was arrested last September, and his court hearing took place this week. He has pleaded not guilty to two counts of murder.
Prosecutors on Thursday said Khaw, who worked as a professor at Hong Kong's Chinese University, order the carbon monoxide through his office and claimed it was for research purposes, the Post said.
He then used it to fill up the yoga ball, took out the plug, and placed it inside his wife's car.
Khaw's colleagues told a Hong Kong court this week that they saw Khaw filling two yoga balls with carbon monoxide, the Post reported. He reportedly told them that he wanted to test the purity of the gas, and that he wanted to see its effects on rabbits.
Khaw later told police that he wanted to use it to exterminate rats at home, the AP reported, though his maid said his house didn't have a rodent problem.
The gas he ordered was 99% pure and cost the university tens of thousands of Hong Kong dollars, the Post reported, citing invoices seen in court.
Family problems
According to the Post, Khaw had been having an affair and had become estranged from his wife and four children, although they all continued to live together.
A friend of Wong, the wife, told the court that Khaw's mistress had been the children's tutor, the Post reported on Friday. She had also been listed in the research project Khaw claimed to justify his need for the carbon monoxide.
The court also heard that Wong had known about the affair but refused her husband's request for a divorce, the Post reported.
The couple's maid, Siti Maesaroh, also testified that the Khaw and Wong had been sleeping in separate rooms at home and driving different cars, the Post said.
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