Charting the teacher-student relationship between Tey Tsun Hang and Darinne Ko

Tey Tsun Hang sentenced to 5 months jail

Former National University of Singapore (NUS) law professor Tey Tsun Hang was sentenced to five months jail in the sex-for-grades case on 3 June.

He was also ordered to pay a penalty of $514.80 which includes the balance of a dinner bill and the cost of two tailored shirts from his former student Darinne Ko.

Tey, who was convicted of corruptly obtaining gifts and sex from Ko on 28 May, has filed an appeal and was granted bail at $150,000.

The 42-year-old father of one faced six counts of corruptly obtaining gratification in the form of gifts and sex from Ko in return for giving her better grades between May and July 2010. Ko got pregnant during their affair and paid for her own abortion.

The chief district judge said Tey was dishonest, and not a credible and truthful witness. He also took advantage of his student and his relationship with Ko was of “ulterior motive”.

NUS terminated Tey's employment with immediate effect after he was convicted.

Here's a look back at the dramatic sex-for-grades trial.