An attempt to halt the trial of an immigration officer and interpreter accused of threatening wrongly jailed teenager Lin Qiaoying into making a false confession failed yesterday. Defence lawyers had earlier tried to discredit the girl, calling her 'extremely cunning' and claiming she came from a suspicious background. But Judge Barnabas Fung Wah ruled part-time interpreter Wong Kin-ang, 45, and immigration assistant Wong Chui-kam, 28, both had a case to answer on a charge of perverting the course of justice and that the trial must continue. Prosecutor Michael Lunn SC said the issue of Ms Lin's reliability and credibility should be reserved until the end of the trial. 'There is nothing tenuous about the assertions that Ms Lin has made, particularly in relation to the interpreter. She was adamant as to who had done what to her,' Mr Lunn said. He urged the judge to consider the difficult circumstances Ms Lin, 18, was facing that may have put pressure on her when she gave evidence. 'The court has to consider Ms Lin has gone through lengthy cross-examinations, day after day,' Mr Lunn said. He also accused the immigration officer of joint responsibility with the interpreter for alleged irregularities in documents drawn up during an interview with Ms Lin at Chek Lap Kok airport, which led to her conviction. Barrister Phil Chau, for the interpreter, told the court that his client chose not to give evidence. Three witnesses will be called for his case, including a duty lawyer and a court liaison officer. The court had heard that a duty lawyer had mitigated for Ms Lin when she had been brought before the court in October 1999 on a charge of possessing a forged travel document. Ms Lin had conceded she had lied to the duty lawyer on this occasion, when she said that she was left alone in Fuzhou by her family, and that she had bought a forged passport enabling her to go to the United States. The trial continues today.