Sins of the FathersThe Fifth DCI Jack Callum MysteryDeath comes calling at Welwyn and Hatfield police station as one of Jack’s colleagues is brutally murdered.The investigation is taken out of Jack’s hands and assigned to a Superintendant from Scotland Yard. Undeterred Jack continues to investigate his friend’s life and the circumstances that led to his murder. As revelation follows shocking revelation he starts to doubt the wisdom of his decision.