The OathBy: John Lescroart Series: Dismas Hardy When HMO executive Tim Markham is hit by a car during a morning jog through his exclusive San Francisco neighborhood, he has the bad luck to be transported to one of his own hospitals . . . and winds up dead in his ICU bed. But in spite of the rumors about his company's substandard care, this death appears to be a case of malice, not of malpracticeespecially after Markham's entire family is gunned down in their