The Triangle Murders by Lynne Kennedy

When a young reporter is pushed from a ninth story window in Greenwich Village, NYPD Homicide Lieutenant Frank Mead soon connects the case to a murder that took place at the same site a hundred years earlier, during the infamous Triangle Shirtwaist Factory fire. Following the devastating suicide of his wife seven years earlier, Frank abandoned his daughter Amanda and the city he loved. Now he’s back to make amends and finds he has an urgent and personal reason to track today’s killer. Amanda, also a reporter and friend of the dead girl, has gone missing. In the family tenement, Frank finds a “murder book” and evidence of the 1911 murder. The victim was, in fact, his great grandmother, a seamstress at the Triangle. Now, working with modern forensics, he is able to uncover killers in both centuries and in doing so, establish a tentative truce with his daughter.