Above the Law (1986) Sub Ro.

(aka) Zhi fa xian feng (aka) Righting Wrongs . Yuen Biao plays Jason Chan a lawyer, angry at the way the law seems to protect the bad guys, he decides to take the law into his own hands when a key witness and his entire family are murdered. but Cindy Si is soon on his case and it all spirals into a situation only a few will survive.