A SELF-PROCLAIMED altruist convicted of blackmailing two company directors with the threat of exposing their alleged corruption to the ICAC escaped a jail term yesterday. Sunny Tang Wai-hung, 40, who struggled to remain composed in the dock while his counsel Eric Kwok pleaded in mitigation on his behalf, shed tears when he heard his sentence would be suspended. Tang, a former conveyancing clerk with a firm of solicitors, was found guilty on two counts of blackmail, which he had denied. Although Tang claimed he was working undercover to extract evidence to substantiate his complaint to the Independent Commission Against Corruption, Deputy Judge Muttrie found the idea of Tang acting as an altruistic crusader extremely farfetched. Tang had used a defence similar to that employed by former lawyer Augustine Chung Shai-kit almost 19 years ago. Mr Chung, who claimed he was only conducting a psychological experiment at the time, was acquitted of a blackmail charge in 1975. Tang was sentenced to two years' imprisonment, suspended for two years, for each of the two charges. The sentence is to run concurrently. Deputy Judge Muttrie described the case as unusual. The threat was exposure of a course of action - an alleged conspiracy to defraud the Government. It was the Crown's case that Tang approached Legon Trading Ltd directors Mui Fung-kee and Wong Tat-tong, separately in July last year and demanded $200,000 from each of them. The sums would be in return for not reporting them to the ICAC. He claimed he had evidence showing Ms Mui and Mr Wong corruptly obtained information from the Land Development Corporation about the resumption of land in Central. Passing sentence, Deputy Judge Muttrie said: ''[Tang] needs to be deterred from such clever, but none-too-clever, dishonesty in the future.'' Although the judge found no grounds for leniency except Tang's clear record, he held that a suspended sentence would be sufficient to achieve the necessary deterrence. Mr Kwok submitted that Tang had committed the offences out of a mixed motive - to take revenge on solicitor Ng Siu-pang and to obtain money to lie low. Tang had suspected that Mr Ng had reported him to the ICAC about an unrelated fraud case. Evidence called by prosecutor David Fitzpatrick showed that Tang - under investigation by the ICAC for a separate matter since March 3 last year - had made a counter-allegation against the two victims and Mr Ng during the ICAC inquiry. Under an ICAC arrangement on July 30 last year, Mr Wong handed Tang $50,000 cash and a $50,000 cheque at a restaurant. Tang was then arrested.