The anticorruption agency didn't comment on his status Friday, and Walter Kwok declined to comment.

WSJ: Hong Kong Tycoons Charged With Bribery

In a court battle, Walter Kwok said he was healthy.

WSJ: Sun Hung Kai's Raymond Kwok Denies Wrongdoing

Walter Kwok himself was omitted as one of the beneficiaries.

FORBES: Billionaire's Family Feud Redux

In 2008, Walter Kwok was ousted as chairman.

WSJ: Sun Hung Kai's Raymond Kwok Denies Wrongdoing

Former chairman and eldest brother Walter Kwok, said through his spokeswoman Tuesday that he felt very sorry about the whole incident and urged the staff of Sun Hung Kai to continue to perform their duties well.

WSJ: Sun Hung Kai's Raymond Kwok Denies Wrongdoing

The eldest brother, Walter Kwok, was kidnapped in 1997 by a man nicknamed "Big Spender" and held for a week until he was ransomed, and a feud between Walter and his two brothers in 2008 dominated Hong Kong newspapers for weeks.

WSJ: The Family Behind Hong Kong's Skyline

Founded in 1963 by the company's late patriarch, Sun Hung Kai developed into one of Hong Kong's most successful businesses, and when the elder Kwok died in 1990, he left the reins of Sun Hung Kai to his three sons, with the eldest, Walter Kwok, at the helm.

WSJ: Sun Hung Kai's Raymond Kwok Denies Wrongdoing

The third Kwok brother, Walter, who is estranged from Thomas and Raymond and who was arrested in relation to the case about five weeks after his brothers, wasn't charged.

WSJ: Hong Kong Tycoons Charged With Bribery

The elder Mr. Kwok died in 1990, and leadership of the company fell to Walter.

WSJ: The Family Behind Hong Kong's Skyline