Murder Me, Murder You (1983)

Hammer is called before a Grand Jury by the only girl he ever proposed to, Chris Jameson. She wants him to protect her as she is to testify in a case against the Vance Helicopter Company for selling secrets to countries on the banned list. Chris also tells Hammer that he has a daughter, Michelle. When Chris is murder in the Grand Jury room Hammer is determined to find her killers and his daughter. There is a twist when Jack Vance tries to hire Hammer, and another one when he finds out his daughter appears to have been a porn star. However, his daughter has disappeared. There are more twists and turns before Hammer brings the case to a conclusion.