Malaysia's High Court on Monday ruled that opposition leader Anwar Ibrahim's defence team had a case to answer in his sodomy trial, after finding the prosecution's main witness "credible". Anwar is on trial over allegations that the 63-year-old father-of-six sodomised a 25-year-old former aide at an upmarket condominium in June 2008. "I find a prima facie case... has been made out against the accused," High Court judge Zabidin Mohamed Diah told a packed courtroom. "Therefore the accused is called to enter his defence." Under Malaysian law, a judge decides after the prosecution has presented its case whether to dismiss the charges or to ask the defence to enter its response. "I found (prosecution witness Mohamad Saiful Bukhari) to be a credible witness. There is nothing improbable about his evidence. His evidence is reliable," he said. The judge also found there was evidence that Anwar and Saiful were at the scene of the alleged crime at the time in question and that there was "opportunity for the offence to have taken place". Sodomy is illegal in Muslim-majority Malaysia, whether or not between consenting adults. Anwar, a former deputy prime minister, could face up to 20 years in jail if convicted. The marathon trial began in January last year but has been punctuated by delays. Police are separately investigating allegations that Anwar is the man in a video purportedly showing an assignation with a female prostitute in a hotel room in February. Anwar has denied the allegations. The opposition leader has insisted the accusations are part of a long-running government plot to derail his political career, but authorities deny any conspiracy. He was sacked as deputy premier by then prime minister Mahathir Mohamad in 1998 and found guilty of corruption and sodomy, but was released from jail in 2004 after the sodomy conviction was overturned. He has since become an electoral threat to the ruling Barisan Nasional, which has been in power for half a century. The trial is to resume on June 6, according to court officials.