Lai Sun Group chairman Lim Por-yen was detained in Taipei yesterday in connection with an alleged $23.7 million bribery scandal.
Mr Lim, also chairman of ATV, is being questioned about the re-zoning of farmland he owns near the proposed site of the National Taipei University at Sanhsia, Taipei County.
Chuang Yu-kun, director of the Taipei County Government's Land Administration Bureau, is accused of accepting bribes worth NT$100 million (HK$23.7 million) for information on the location of the new campus.
He has been in detention since last month over his alleged involvement in a separate suspect land deal, but Mr Lim is being questioned only about the Sanhsia case.
Agents from the Justice Ministry's Bureau of Investigation detained Mr Lim, 83, at Taipei airport yesterday.
Prosecutor Hsueh Wei-ping said the former Preparatory Committee member had not been formally arrested or charged.