Police have questioned a 66-year-old man they believe may be linked to threats against legislator Emily Lau and vandalism attacks against her office in Sha Tin. The man was released unconditionally with no charge laid against him, although it is believed that police are still gathering evidence against the suspect. The latest attack happened on September 3 when the door of her office in Hok Sum House, Lung Hung Estate, was smeared with excrement. The attack is believed to have stemmed from Ms Lau's appearance at a conference in Taipei, organised by a pro-independence organisation and attended by former Taiwan president Lee Teng-hui. In July, leftover food was smeared on windows of her office and a piece of paper wrapped round a lump of concrete was found hanging on the door bearing the words 'Emily Lau is a traitor'.