The daughter of an anaesthetist accused of gassing his wife and another daughter to death using a yoga ball filled with carbon monoxide described her dead sister as her "soulmate" in a Hong Kong court Monday.
Prosecutors have accused Khaw Kim-sun of leaving the inflatable ball in the boot of a car where the gas leaked out and killed his wife and 16-year-old daughter Lily.
Khaw, 53, was having an affair and his wife would not grant him a divorce, prosecutors said.
They accused him of hatching a deliberate plot to murder her, but said it was likely he had not intended to kill his daughter.
Khaw's eldest daughter May-ling, 19, spoke of her sister at the High Court trial Monday.