No Way to Treat a Lady (1968)
No Way to Treat a Lady (1968) is a darkly comic thriller directed by Jack Smight, with a screenplay by John Gay adapted from William Goldman's novel of the same name. The film starred Rod Steiger, Lee Remick, George Segal and Eileen Heckart. Segal was nominated for a BAFTA for his role as Detective Moe Brummel.
More at Wikipedia.