Walter Kwok Ping-sheung's arrest came just two days after the former chairman of Sun Hung Kai Properties (SHKP) publicly distanced himself from the bribery scandal engulfing the company.
His younger brothers, SHKP co-chairmen Thomas Kwok Ping-kwong and Raymond Kwok Ping-luen, and Rafael Hui Si-yan, a former chief secretary of Hong Kong, were arrested by the Independent Commission Against Corruption on March 29.
Walter Kwok told the South China Morning Post on Tuesday: 'As a matter of fact, I was not involved [in the alleged corruption].' He also said he had no knowledge of what Hui was doing while he was a consultant for the company. Hui is the highest-ranking former government official arrested in the ICAC's 38-year history.
None of those arrested has been charged, and they are all out on bail.
In an interview, published on Wednesday, Walter Kwok, who was ousted in 2008 after 18 years as the firm's chairman, told of a new front he had opened in his battle to regain his inheritance in SHKP.
The family feud over control of the company began that year, when he was demoted to non-executive director. He was replaced as chairman by his mother, Kwong Siu-hing, who stepped down late last year in favour of his brothers.
He is challenging the validity of Kwong's removal of him as a beneficiary of the family trust that controls the property empire.