The assistant of late tycoon Nina Wang Kung Yu-sum said he gave evidence accusing "some members of Chinachem" of perverting the course of justice and deception to the police yesterday. Ringo Wong Lai-chuen worked closely with Wang - once Asia's richest woman - for 27 years. Arriving at the Wan Chai police headquarters last night, Wong said he handed documents to the police to support his allegations of perverting the course of justice and deception. "The evidence is against some members of Chinachem," he told the South China Morning Post , refusing to divulge names. "They are people who were barely noticed in the past, but climbed to higher positions." He said he was acting amid worries that the fortunes made by Nina Wang and her late husband Teddy Wang Teh-huei would be mishandled. A police spokeswoman said the police had not opened any new case following Wong's visit. Wong explained he was told to submit more supporting documents to the police. He said he would do so as soon as possible. In January, Wong filed a complaint with the Independent Commission Against Corruption. This move came a month after he told a Chinese language newspaper that "someone" from Chinachem was in "serious breach" of his or her duty. Wong has been critical of how Chinachem Group has managed the Chinachem Charitable Foundation, which was the major beneficiary of Nina Wang's will. Wang died in 2007. Under her will, the foundation is the sole owner of the Chinachem Group, one of the city's largest private property developers. The will also says the foundation has to set up a Chinese Prize similar to the Nobel Prize. The foundation holds Wang's HK$83 billion fortune in trust, and it is obliged to carry out the terms of her will, including performing charitable works, rather than receiving the estate as a gift, free of obligations. Chinachem could not be reached for comment last night.