The Pakistan supreme court has set up a judicial commission to investigate a secret memo scandal that threatens the federal government.<br /><br />The scandal centres on a memo allegedly sent in May to Admiral Mike Mullen, chairman of the US joint chiefs of staff at the time, asking for help in stopping a supposed army coup following the Navy Seals raid in May that killed Osama bin Laden, the al-Qaeda chief.<br /><br />The scandal first erupted in October when Mansoor Ijaz, a US businessman of Pakistani origin, wrote a column in the Financial Times newspaper claiming that Husain Haqqani, the US ambassador in Washington, drafted the memo and asked him to send it.<br /><br />Asma Jahangir, Haqqani's defence lawyer, discusses the supreme court ruling in interview to Al Jazeera from Lahore, Pakistan.