Sea of Love(1989)
Detective Frank Keller (Al Pacino) is tracking down a murderer who finds their victims through the singles ads. In the midst of working on the case, he falls in love with a woman named Helen Cruger (Ellen Barkin), who, little does he know, is one of the prime suspects in this case.
This is a better-quality theatrical trailer.
Missing a few seconds at the beginning, this TV spot was originally posted to YouTube by robatsea2009.