A 'neurotic' husband bludgeoned his wife to death because he believed she was planning to run off with a Taoist priest who offered to heal their autistic daughter, a court heard.
Tsang Ying-sang, 52, stopped taking his psychiatric medicine at least two weeks before he fractured his wife's skull with a 37 cm screw, psychiatrist Dr Henry Yuen Cheung-hang told the Court of First Instance yesterday.
He said that unemployed Tsang had repeatedly refused to be admitted to hospital for psychiatric treatment.
Tsang was said to be suffering from dysthymic disorder, characterised by neurosis or depression.
He was supposed to be taking medication, but no trace of it was found in a blood sample taken just after the killing.
Dr Yuen said it would have taken at least two weeks for the drug to leave his system.