Chau Ching-ngai was granted special favours while in prison Shanghai has detained a prison supervisor for giving special treatment to property tycoon Chau Ching-ngai while he served his jail sentence, in a bizarre twist to a three-year old property scandal. Mr Chau, once the mainland's 11th richest man, was released from jail in late May after serving a three-year term for manipulating stock prices and falsifying registered capital of companies under his flagship Nongkai Development Group. Authorities had removed his former personal guard, Yu Jinbao , from his position at Shanghai's Tilanqiao Prison and was investigating him for abuse of power, Caijing magazine and the 21st Century Business Herald reported. Prison officials could not be reached for comment yesterday. A whistleblower told prosecutors that Mr Chau received special privileges in prison, including frequent access to the telephone and watching television in the supervisor's air-conditioned office, Caijing said on its website. He did not work or stay in areas designated for prisoners. And he met friends and relatives frequently instead of once a month, which is the rule. Yu allegedly also gave Mr Chau a positive evaluation for his behaviour, a report which could be used to shorten an inmate's sentence. The prison had considered allowing Mr Chau to apply for a reduction in his term last September, but that was aborted after it became known he was wanted by the Independent Commission Against Corruption in Hong Kong for crimes relating to his listed companies. Yu was assigned as Mr Chau's full-time guard to give him 'one-to-one help and education' when he started his sentence in June 2004. The property developer's time in detention was credited towards his jail sentence. Prison authorities told officers at an internal meeting on August 18 that Yu had been detained for 'seriously violating party discipline and work rules'. Mr Chau himself is reportedly again under investigation due to allegations that Fuyou Securities, which he owns, embezzled 3.8 billion yuan in treasury bonds from the former Shanghai Rural Credit Co-operative Union, the 21st Century Business Herald said. The credit co-operative was restructured into the Shanghai Rural Commercial Bank last year after the local government paid 5 billion yuan to offset its bad debts. The bank and the Shanghai branch of the China Banking Regulatory Commission declined to comment. A group of Shanghai residents last month called on China's top prosecutor to reopen the investigation into Mr Chau regarding a project in the city's Jingan district, claiming corruption in his acquisition of the land and failure to pay adequate compensation. After the scandal broke in 2003, residents making similar claims lost their court cases against the district.