The corruption watchdog might have bugged a private phone conversation between a barrister and his client, the District Court heard yesterday. Graham Harris, defence counsel for prominent solicitor Andrew Lam Ping-cheung, lodged a complaint to the court voicing suspicion that his conversations with Mr Lam had been monitored by the Independent Commission Against Corruption. Mr Lam, 53, an ICAC investigator-turned-solicitor, and criminal barrister Kevin Egan, 58, are jointly charged with conspiracy to pervert the course of justice. Also facing the same charge are former Semtech chairman Derek Wong Chong-kwong, 37, and company director Mandy Chui Man-si, 25. The charges relate to an ICAC investigation into alleged stock manipulation of the publicly listed Semtech International Holdings. Mr Harris told the court yesterday he had a phone conversation with Mr Lam on Thursday about a legal document provided by the prosecution the previous day. He said they discussed a mistake in the document and 20 minutes after their conversation he received an amended version of the document with the mistake fixed. Government prosecutor Alex Lee responded that the legal document was amended simply because a mistake had been made. Judge David Lok said he had noted the complaint. The charges state that between July 11 and 17 last year the four conspired to pervert the course of justice by giving information to journalists to publicise a woman's assistance to an ICAC inquiry. They also allegedly made false claims she was being detained against her will. Mr Lam and Mr Egan were also charged with conspiracy to disclose information to journalists about the identity of a witness in the witness protection programme. The four did not enter pleas and the case was adjourned to July 11 for a pretrial review and a trial date was set for February 20 next year.