The Final Judgement (1993)

Simon Yam plays a straight laced family man who one day is convicted of a crime he says he didn't do. But, with the police nailing him with scientific evidence (dust and cloth fibers) he is convicted of first degree murder and sentenced to death. His wife in desperation turns to prostitution to support herself and her young daughter while she tries in vain to get her husband released. Cecilia Yip plays the wife and Bill Tung plays a detective who does't fully trust scientific evidence solely to arrest someone.