Heart Condition (1990)

Jack Moony, a white police officer, has it in for a Black lawyer to the drug crowd, Napoleon Stone. That Stone is now dating his ex-girlfriend doesn't help matters. Stone is shot after Moony suffers a heart attack and awakens to find that he not only has a new heart, but that it is Stone's--and that Stone's ghost is now his constant companion. Stone is insistent that Moony not only take care of his heart now, but also that Moony solve his murder.