In 2018 a professor from a Hong Kong university was sentenced to life imprisonment for killing his wife and daughter using a gas-filled yoga ball as his murder weapon. Prosecutors had accused the anaesthesiologist, who pleaded not guilty to murder, of putting a leaking yoga ball containing carbon monoxide inside a car driven by his wife. A police officer who found a deflated yoga ball began an investigation culminating in shocking courtroom revelations of a most calculated crime. Online feature…