Tightrope (1984) on Netflix

Divorced Wes Block is a New Orleans homicide detective who has custody of his two adolescent daughters, Amanda and Penny. Father and daughters have a special bond with each other. Wes' latest case is investigating a series of murders, all the victims who are known or initially unknown sex trade workers and who were sexually assaulted before being strangled. At each of the crime scenes is fiber from a red ribbon, which is believed to be the murder weapon. Because of the sexual nature of the murders and the belief that it is a serial killer at work, rape services counselor Beryl Thibodeaux insinuates herself into the investigation. After a rocky professional start between the two, Wes and Beryl begin a personal relationship. As Wes gets deeper into the investigation and as more victims surface, Wes knows that the murderer is following his every move, especially as some of the victims are those with whom Wes has had contact, sometimes intimate contact. As the murderer begins to taunt Wes, Wes fears for Amanda, Penny and Beryl's safety. As such, solving the case becomes more of a personal vendetta for Wes, as the crimes themselves seem to be a personal vendetta against Wes.