The amount of carbon monoxide which killed a Malaysian professor’s wife and daughter, and which he had allegedly placed inside a yoga ball in the boot to kill them, could have been at least 35 times the dangerous level, a forensic scientist told a court on Friday.
Government chemist Wong Koon-hung ran simulations of the leak, and said that at one point during his experiment the concentration of carbon monoxide in the car went beyond 7,000 parts per million (ppm). He said any reading of more than 200ppm would be dangerous.