Law prof Tey kept saying "it's so shameful" on the day he was picked up by CPIB

The law professor defending himself in his sex-for-grades corruption trial kept saying "it's so shameful" on the day he was picked up by the Corrupt Practices Investigation Bureau (CPIB) on 2 April last year.

CPIB officer, Mr Michael Oh, told the court on Monday morning that Tey Tsun Hang, with his head hung low, was sobbing in the interview room. 

Mr Oh, the prosecution's 9th witness, also gave an account of the events leading to Tey's hospitalisation that same day. 

When it was Tey's turn to cross-examine the witness, Tey said he had no questions. 

He told the court that the 2nd of April was too traumatising and that he didn't recognise the witness. 

He did the same thing for the prosecution's 10th witness - Mr Raymond Wee, who's also a CPIB officer. 

The prosecution's 11th witness, CPIB investigator, Thomas Cheo, also gave his account of his interaction with Tey during the investigation. 

The prosecution's 12th witness is Hasvind Elangovan. 

Tey, 41, faces allegations of obtaining gratification in the form of gifts and sex from former student Darinne Ko, in return for giving her better grades between May and July 2010.