Bala Kuppusamy (born 14 February 1961), a Singaporean citizen, is a convicted robber and serial rapist who had committed various offences of rape, robbery and molestation from 1985 to 2008.

However, the woman's boyfriend did not show up, and afterwards, Bala brought the 19-year-old girl into the men's toilet, where he slapped her (resulting in a mouth injury) and raped her.

[11] After completing two-thirds of his sentence (equivalent to seven years and four months) with good behaviour, Bala was released on parole on 8 September 1992.

[12] 45 days after he was released, Bala Kuppusamy re-offended and attacked four women at or near Marymount Flyover within the last week of October 1992.

[13] Two days after his fourth crime, Bala was arrested on 1 November 1992 for these seven offences against the four victims, and he was identified by the 20-year-old student through a police identification parade.

[17] After completing two-thirds of his sentence (equivalent to 15 years and four months) with good behaviour, Bala was released on parole on 17 March 2008.

In total, seven victims aged between 16 and 34 were targeted by Bala, who committed these offences during night time at secluded areas all over Singapore.

[10][18] On the night of 28 May 2008, along Upper Serangoon Road, a 18-year-old secondary school student, who was a China-born Singapore permanent resident, was heading to Woodleigh MRT station when she was approached by Bala, who pretended to ask her for directions.

However, the trial prosecutor Francis Ng argued before the trial judge, Justice Tay Yong Kwang, that Bala was "a inveterate predator" who posed as a "clear and present danger to society" and referred to his criminal records, which consisted of mostly violent offences like robbery and sex crimes, and argued that Bala resorted to violence and threats in all his crimes against the seven victims to achieve his goals, and even committed sexual assaults on a majority of his victims.

[10][12][19] In his verdict on sentence, Justice Tay condemned Bala as a "merciless, marauding monster" who had no qualms about resorting to violence when targeting defenceless young women, and stated that Bala had a strong propensity to re-offend based on the fact that he committed strings of aggravated robberies and sexual offences merely weeks after he was released for both the second and third time respectively, showing he had the inability to distance himself from criminality in spite of the long terms of incarceration and high number of cane strokes he received, and he called Bala's criminal history "appalling".

[20][21] Justice Tay stated that for his frequent attacks on women throughout the past few decades, Bala himself was indeed a menace to society and he was "not fit to live freely in society", and he said that it would be too lenient to sentence Bala to serve even the maximum period of 20 years' preventive detention, a special type of imprisonment without the possibility of parole for recalcitrant criminals.

He also stated that Bala's promise to not commit any crime again till his death was "extremely hollow" in view of the aggravating factors of his case and his long criminal history.

[10] Bala is currently behind bars serving his 42-year jail term since 30 June 2008, with the possibility of parole in 2036 after completing two-thirds of his latest sentence (equivalent to 28 years).

[25][26] Bala's sentence of 42 years' imprisonment was one of the longest jail terms which the courts handed down in cases of rape or any other sexual offences in the past few decades.

It was noted that the prison statistics showed that the probability of low-risk sex offenders to re-offend was only 6.9% within two years of release, although many noted that the case of Bala highlighted the need for more effective measures to reform sex criminals and they also mentioned that there could be many other factors behind why Bala re-offended a short time after his release, like his inclination towards rehabilitation and rate of access to resources available to assist in his rehabilitation and re-integration into society.