Skirmish (1981)

When Janet Duarte's sister Nancy (Mary Concepcion) is killed in a fight, Janet (Kija Manhare) sets out to investigate her sister's death using her skills in escrima. Janet teams up with Sheriff Lon Walker (Jackson Bostwick) who has already been investigating a series of martial arts related murders. Together they work to overthrow the maniacal Teak, whose reprehensible acts have wreaked havoc for decades. The film's climax features the spectacular martial arts skills of Dan Inosanto as Teak's #1 henchman, Julio Montoya.