The former Central Narcotics Bureau (CNB) chief embroiled in a high-profile graft probe has left the board of Certis Cisco.
Mr Ng Boon Gay's recent departure as a director of the security firm happened quietly - marked only by the scrubbing of his profile from the company's website.
It was a contrast to his appointment in May 2009, when Certis Cisco chairman Lim How Teck had welcomed Mr Ng in his message in the firm's annual report.
He said that the then-Criminal Investigation Department head brought with him 'invaluable experience' as Senior Assistant Commissioner of the Singapore Police Force.
A spokesman for the security firm, one of Singapore's largest, said on Thursday that Mr Ng had resigned from the board.
Mr Ng, 44, is one of two senior public servants being investigated by the Corrupt Practices Investigation Bureau (CPIB) for 'serious personal misconduct'.
The case, which broke last month, allegedly revolves around the tender process for IT-related products.
On Thursday, the other man involved, former Singapore Civil Defence Force commissioner Peter Lim Sin Pang, declined to discuss the case when contacted by telephone at his home. 'I do not wish to comment,' he said.
The 51-year-old, however, was not home when The Straits Times visited later in the day.
Both Mr Lim and Mr Ng are said to have had an unprofessional relationship with a 36-year-old female IT executive, who is with an American multinational software firm.
She was previously a sales director in a Japanese multinational.
So far, the woman, whose identity has yet to be revealed, has not replied to requests for comment.
But a source said she has told at least one friend she is innocent, and that 'the truth will emerge soon'.
Internet websites have, however, continued to speculate who this woman is, with several photographs of women posted on online forums and circulating via e-mail over the last week or so.
Meanwhile, in the absence of official confirmation on the identity of the woman, several other executives in the IT sales industry have been named by netizens speculating about details of the probe.
One of them, contacted at the Shenzhen office of the Singapore government-linked firm she is working for, directed all queries to her company's spokesman.
The spokesman had said previously that the company was not aware that any of its current or former employees were being questioned by the CPIB with regard to the probe.
The graft probe is likely to be discussed in Parliament on Tuesday.
Mr Edwin Tong, deputy chairman of the Government Parliamentary Committee for Law and Home Affairs, has said previously that he will raise several questions.