On 2 March 2004, 47-year-old Esther Ang Imm Suan (洪阴钻 Hóng Yīnzuàn) was murdered by her two Indonesian maids, Siti Aminah and Juminem, who also stole her jewellery and money from her house.

During the trial, it was revealed that both the maids were suffering from different types of depression that affected their mental faculties at the time of the offence.

On 2 March 2004, a 47-year-old woman was discovered dead on her bed by her ex-husband at Carissa Park Condominium in Loyang Avenue.

[1][2][3] The victim was identified as Esther Ang Imm Suan, and she was a purchasing officer employed at an oil-rig company.

Esther Ang Imm Suan, born in 1957, was married twice with three children and both her marriages ended with a divorce.

Even after her second divorce, Ang remained on good terms with Boon, who was granted care and control of their sons, both of whom lived with their father and grandmother in Pasir Ris.

Ang herself lived alone at Carissa Park condominium, and at the time of her death, she worked as a purchasing officer in an oil-rig company.

[11] Born on 12 April 1985, Juminem (who goes by one name) was the youngest of seven children from her family, who all lived in Margomulo, a village in Lampung, Sumatra.

Although she was only 15, Siti falsely declared her age and claimed to be older, which enabled her to enter Singapore to work.

He found that Juminem suffered from reactive depression of moderate severity, and it substantially impaired her mental responsibility.

Dr Kong stated that based on Juminem's diary entries, he noted that her initial optimism towards her work was gradually marred by her strong sense of homesickness, loneliness and longing for her boyfriend and family, and her impression about her employer.

[24] Dr Kong also said that Juminem noticeably lost weight while she worked in Singapore, and had difficulty adjusting to a different environment from her home, as well as suffering from insomnia and her low self-esteem from Ang's frequent criticisms of her work performance, he determined these above factors as the symptoms of her disorder and that it was exacerbated by Ang's scoldings and her financial woes.

Dr Ong, a consultant psychologist, testified that Siti had low IQ, and as a result, she lacked the ability to think logically and had difficulty understanding the co-relations between given matters and actions.

[4] As for Dr Ung, a consultant psychiatrist, he testified that Siti suffered from a depressive disorder, and he referred to Siti's inability to adjust to a foreign environment and her lack of familial support in a foreign land, as well as her immaturity, inability to cope with stress, the huge financial burden she bore, and the frequent scoldings she received from Ang, it led to Siti having a depressed mood, weight loss, fatigue, difficulty in thinking and concentrating, and also feelings of worthlessness.

[28] Dr Cai Yiming, a senior consultant psychiatrist who assessed Siti, similarly stated that she was not suffering from diminished responsibility.

In his verdict, Justice Choo found that the two maids indeed suffered from diminished responsibility and that the defence's psychiatric evidence should be accepted over those of the prosecution.

Since the killing of Esther Ang occurred on 2 March 2004, six years and seven months after the legal reform, Juminem, who received a life sentence for this case, was to be imprisoned for the remainder of her natural lifespan.