The corruption trial of former civil defence chief Peter Lim Sin Pang will likely draw to a close on Tuesday, with both defence and prosecution returning to court to make their final arguments in the morning.

Lim, 52, is charged with corruptly obtaining oral sex from former Nimrod Engineering general manager Pang Chor Mui, in exchange for furthering the business interests of her company.

Deputy Public Prosecutor Tan Kiat Pheng had in March applied to impeach Lim, when he listed several examples where Lim's testimony in court were inconsistent with his Corrupt Practices Investigation Bureau (CPIB) statements. One example was that Lim told the court it was Ms Pang Chor Mui, 49, who had initiated oral sex with him, when in his statement to CPIB he had said he asked her for sex directly and drove straight to the Stadium carpark where the incident took place in May 2010.

District Judge Hamidah Ibrahim allowed the prosecution to cross-examine Lim on the parts of his court testimony at odds with his CPIB statements. The court will first hear closing submissions from defence counsel, followed by the prosecution, upon which the Judge will decide whether to deliver the verdict immediately or at a later date.