A doctoral student who was yesterday found guilty of conspiring to blackmail a member of a religious group for more than HK$6 million over their sex acts together indicated he would help police identify other blackmail victims. The legal team for Cheung Ka-wo, 28, who was convicted on two counts of conspiracy to blackmail, also indicated that Cheung was prepared to become a prosecution witness against his named fellow conspirator, who has not been formally charged. Delivering his verdict on Cheung, Deputy District Court Judge Cheang Kei-hong said that the sex acts between Cheung and the male blackmail victim, X, shown in a 72-minute video that Cheung secretly taped, were consensual and Cheung's claim that he was sexually assaulted by X was unfounded. The judge found Cheung, a doctoral student in economics at Chinese University, conspired with Li Dora Kay to blackmail X, and the head of his religious group, Y, between April and May last year. The court suppressed the victims' names. X, a manager of the secondary school where Cheung previously studied, had handed over HK$811,000 to stop Cheung and Li publicising a sexual relationship between himself and Cheung that started in late 2008, the court heard. Cheung and Li took the video and a news report about a scandal involving an overseas religious group to Y's office on May 22 and asked for compensation. Y questioned X about the matter and X alerted police two days later. The judge said Cheung and Li were fully aware that Cheung had been willing to have sex with X. Referring to the video used to blackmail X, the judge said that given the pair talked casually and joked during their intimate encounters, the atmosphere in which they met was obviously relaxed. The video played earlier in the court showed X removing Cheung's trousers and underwear. Cheung had to read phrases glorifying the sexual ability and body of X while demeaning his own, as X fondled his genitals. The two later bathed together. Cheung washed X's hair and offered to massage him. The judge found Cheung was cooperative and the pair had displayed care for each other. 'The only reasonable inference is that the sex acts were consensual,' the judge said. 'The defendant had been exaggerating when he described himself as a kid being molested by X,' the judge said. 'His age and his education qualification suggest otherwise.' Although the court was told that Cheung did not make any verbal demand for money from X and Y, the judge ruled that Cheung had taken a supportive role in the blackmail. 'If Cheung was unaware or unwilling to take part in the blackmail plot, he would have quit after he first saw [Li] demanding money from the victims,' the judge said. 'But Cheung was present on each and every occasion.' The judge said that at the moment Cheung agreed to make the video he had reached an agreement with Li to blackmail X. The court heard that Li suggested that Cheung buy a spy camera to film his sexual activities with X to gather evidence to ask for what she termed 'compensation' from X. After Cheung's conviction, defence counsel Albert Luk Wai-hung told the court that Cheung was willing to become a prosecution witness against Li, after the judge affirmed in his verdict that Cheung had committed the crime together with Li. Li, who was arrested for the same offences, has been on police bail. She last reported to police in early July and is due to report again next month. Police and Department of Justice officials yesterday declined to say why Li has not been formally charged. In mitigation, Luk said Cheung did not pocket any of the blackmail money. The barrister submitted 60 letters written by Cheung's relatives, former teachers, headmaster and professors. They described Cheung as a responsible, diligent and promising youth whose offences were out of character. Luk also submitted 80 certificates Cheung had been awarded for outstanding academic and musical achievement. The court heard that Cheung had several times been named as the best tutoring assistant at his university, won drawing contests, and attained a Trinity Guildhall piano diploma. After Cheung's conviction, his mother, sister and girlfriend huddled together and wept outside court. 'From the beginning to now, I still believe that my brother is innocent,' said Cheung's sister Melanie Cheung Ka-yin. Cheung was remanded in custody to appear on August 11.