Zin Mar Nwe v PUBLIC PROSECUTOR

Facts

Ms Zin Mar Nwe, a Burmese national, came to Singapore on 5 January 2018 as a foreign domestic worker, falsely declaring her age as 23; bone-age tests later showed she was closer to 17 at the time of the offence. Her third employer in about four months was Mr S. His mother-in-law was staying with the household. On 25 June 2018, while alone with her, Ms Zin took a kitchen knife and stabbed her 26 times as she lay on a sofa, killing her. She then retrieved her belongings and money from a locked cupboard, washed the knife and left it in the kitchen, and left the flat. She was arrested that evening at her employment agency.

She first told police two men had attacked the deceased, but from her third statement admitted the stabbing. She said the deceased had hit and scolded her and then said "Tomorrow. You. Go. Agent.", which she understood as a threat to send her back to Myanmar in debt. At trial on a murder charge under s 300(c) of the Penal Code (Criminal Case No 60 of 2021) she relied only on diminished responsibility. The trial judge rejected that defence, convicted her of murder and, because she was likely under 18, imposed life imprisonment. In Criminal Appeal No 10 of 2023 she maintained diminished responsibility and raised grave and sudden provocation for the first time.

Issues

1. Whether the trial judge erred in rejecting the defence of diminished responsibility under Exception 7 to s 300
2. Whether the partial defence of grave and sudden provocation under Exception 1 was reasonably available on the trial evidence and was made out
3. What sentence was appropriate for culpable homicide committed under grave and sudden provocation

Holding

The Court of Appeal allowed the appeal against conviction, substituting for the murder conviction one of culpable homicide not amounting to murder punishable under s 304(a) of the Penal Code, committed under grave and sudden provocation. It set aside the life sentence and sentenced her to 17 years' imprisonment, backdated to 25 June 2018.

Reasoning

On diminished responsibility, the defence expert's opinion rested on her being in a dissociative state, but he conceded at trial that she knew what she was doing, which was inconsistent with dissociation. His report relied on her uncorroborated account given about two years later, and he did not explain how the adjustment disorder he diagnosed caused the alleged dissociation. The judge was entitled to prefer the Prosecution expert's view that she had no mental illness.

On provocation, an accused may raise a defence on appeal if it was reasonably available on the trial evidence. On the subjective test, her statements from 29 June 2018 onwards gave a consistent account of shaking with anger and not knowing what happened in her head. That account was credible because she had confessed and had never relied on provocation at trial. The frenzied attack, the absence of premeditation and her aimless wandering afterwards supported a loss of self-control; awareness of her actions did not exclude it. On the objective test, the court did not accept her uncorroborated allegations of longer-term abuse, but upheld the judge's finding that the deceased had hit her that morning. Weighing that with her youth, debt, isolation and fear of repatriation, an ordinary person sharing her characteristics would have lost self-control. The court added that a trial judge should consider an alternative defence disclosed by the evidence.

On sentence, the court set out guidelines: life imprisonment is warranted mainly where the offender is a continuing danger, and otherwise the reduction from 20 years depends on the gravity of the provocation and the offender's susceptibility. The threat was grave but a single verbal utterance, warranting a modest reduction to between 16 and 18 years. The use of a weapon, the brutality and the domestic setting aggravated the offence, but the court rejected the suggestion that she tried to conceal the crime or evade arrest.

From the judgment