Huang Bocan, 29-year-old, is being accused of assaulting his teenage sister with a wooden pole, resulting in her death in a Clementi flat.
He is facing more than 10 charges alongside his 2 accomplices, Lim Peng Tiong, 62 and Cee Mei Wan, 41.
All three accused may have their current charges upgraded, including to capital ones, which carry the death penalty.
The trio are being accused of hitting Ms Huang with a wooden pole at a Clementi HDB unit on 4 May at around 11pm.
Both Huang and Lim are Singaporeans, while Chee is a Singapore PR.
The case has been adjourned for 2 weeks, pending the results of the post-mortem of the victim, before being heard again on 29 June.
The police prosecutor said that “it’s possible” for the assault charge to be upgraded to a capital charge.
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