A former law professor in Singapore had a corruption conviction overturned today after a judge found he had not given one of his students higher grades in return for sex.

Tey Tsun Hang ( left ) was convicted of corruption by a district court in May 2013. He was fired from the National University of Singapore and served five months in prison.

Justice Woo Bih Li cleared Tey of the charges, saying the evidence showed that the student had been in love with him at the time, and was not trying to get better grades from her professor. The judge described Tey as a “man without honour”.

Tey was not in court to hear the decision.

“The damage has been cruelly, and - with the way the Singapore mainstream media reporting was conducted - irreversibly inflicted,” Tey told dpa .

The case had harmed “my integrity, academic career, and academic future, and most importantly, my credibility as an academic critic of the Singapore system,” he said.

Tey believes the charges against him were politically motivated, and that he was prevented from submitting evidence of this to the court during his trial.

He had written articles highly critical of the Singapore judiciary, and was personally criticised in February 2012 by Singapore’s then-Chief Justice Chan Sek Keong. Tey was first arrested in April 2012.

- dpa