On 10 February 1979, jockey Tony Cruz (), his brother and two other persons had an argument in a car park in the New Territories with Wai Kin-bong, who was knocked unconscious and hospitalised until 28 February. Wai was then Director and general manager of Tin Tin Daily News. The paper's owner Lau Tin-chau asked Yeung, a common friend of both Cruz and Wai, to try to resolve the tension between the two. Yeung visited Wai in hospital and offered him a "very substantial sum" of money either "not to give evidence against Mr. Cruz or to give evidence that would not 'nail him down'"., HK Judiciary Judgment. In circumstances where the magistrate found that Yeung had promised Wai he would "fix the police", Cruz was never charged. Yeung was convicted of perverting the course of justice and ultimately sentenced to nine months' imprisonment.
