Complex sentence: Fung then contacts Kwai, explaining that Costello's son-in-law was handing over Fung's financial reports to the police, and that he only ordered his men to kill the parents.
Split into simpler sentences: Fung then contacts Kwai, explaining that Costello's son-in-law was handing over Fung's financial reports to the police. Fung also says he only ordered his men to kill the parents.