Sea Of Love (1989)

Crime drama directed by Harold Becker and starring Al Pacino, Ellen Barkin and John Goodman. New York cop Frank Keller (Pacino) is divorced, disenchanted and coming close to retirement. A serial killer strikes in the city, attacking men in their bedrooms and it would seem that a woman using personal ads is responsible. Keller teams up with fellow cop Sherman (Goodman), who has also had a serial killer operating on his patch, and together they devise the idea of placing their own advertisements in the personal columns, dating the women and collecting their fingerprints. One woman who answers the ad is the beautiful and seductive Helen (Barkin). Frank falls heavily for her and against his better judgement, begins an affair with the prime suspect.