SINGAPORE — A 31-year-old woman who was suffering from persecutory delusions became frightened that her adoptive father would kick her out of the family's Sengkang flat after her adoptive mother died from cancer.After he rejected her demand to be added as an owner of the flat, she killed him at home with a chopper.On July 14, Tan Qiu Yan was sentenced to 18 years' jail after she pleaded guilty to a reduced charge of culpable homicide not amounting to murder for the killing in November 2022.She was originally charged with murder, but was found to be suffering from a delusional disorder that diminished her mental responsibility for her actions.Tan was adopted by Tan Ah Bang and Madam Koh Li Hua in 1992 when she was a baby.After Madam Koh was diagnosed with lung cancer in 2019, she promised her daughter her share of the flat.However, the flat was owned by Tan's parents as joint tenants, which meant that when Madam Koh died, her share automatically passed to Mr Tan.Madam Koh died on Aug 29, 2022. Read more