Mord am Pool(1986)

Jack Radford and his wife Sarah no longer love each other, but money keeps their marriage together. Jack runs the Donnington real estate agency, which Sarah and her brother Edward inherited from their father. Edward, a failed concert pianist, has not been involved in the business for years, but now a real estate scandal threatens to ruin the family business. An apartment building in Spain has collapsed due to structural defects, killing several people in the rubble. The company was heavily involved in the construction and sale. When a dead body is found in the Radfords' pool, Cliff Jordan, nearing the end of his career, gets back to work. At first, all he has is a bloody kitchen knife in his mailbox.