A firm of solicitors has launched bankruptcy proceedings in the High Court against disgraced investor Rogerio Lam Sou-fung, son of Hang Seng Bank's late founder Lam Bing-yim. The petitioner, John Ku Ling-yu, of John Ku & Co, filed the application on Monday. Rogerio Lam was convicted in 2002 of a multimillion-dollar bank fraud. He was sentenced to 20 months imprisonment by District Court Judge Bernard Whaley. The judge also ordered him barred from being a director of any company for five years. He was found to have attempted to use a bogus bank guarantee to obtain a loan of US$200 million from Credit Lyonnais Bank and Deutsche Bank in June 2000. Lam, 71, once ran diverse businesses including a wig factory, one involving property speculation and owned a television station. He tried to clear his name in 2003 by launching an appeal in the Court of Appeal, but the appeal was dismissed. In 2005 Lam faced another civil lawsuit in the High Court when former Carrian boss George Tan Soon-gin filed a claim for defamation against him. The action was filed in the High Court, and Mr Tan also sought an injunction to restrain Lam from making libellous statements. In 1980 Lam offered HK$1.68 billion to buy Gammon House - now the Bank of America Tower - from the Carrian Group. He ended up buying just five floors of its 32 storeys.