A murder conviction in Singapore can attract the death penalty.
Mr Quirk will be remanded at Changi Prison’s medical centre for psychiatric observation before he fronts court again on January 24, according to Channel News Asia.
Mr Quirk lists on his Facebook page that he moved from Melbourne, where he worked as a podiatrist, to Singapore in 2016.
He was a senior podiatrist at Tan Tock Seng Hospital in Singapore until November 2017, according to his LinkedIn profile.
“Armed with more than 17 years in podiatry, I decide (sic) to venture to Singapore with my passion in podiatry, hoping to share my experience and knowledge to the local community,” Mr Quirk wrote.