The Cover Girl and the Cop (1989)

Jackie, an actress/model stumbles upon the murder of a government official and can identify one of the killers. Fabricating a stalker, she gets police protection in the form of Denise Danielovitch, a female cop who never gets to work on the big cases. But thanks to what Jackie saw and an unpublished manuscript Danielovitch is about to solve one of the biggest mysteries of the 20th Century. In the meantime, the two opposites bond and discover talents they never knew they had.