Rough Justice — Lisa Scottoline

Criminal lawyer Marta Richter is hours away from winning an acquittal for her client, millionaire businessman Elliot Steere, on trial for the murder of a homeless man who had tried to carjack him. But as the jury begins deliberations, Marta discovers the chilling truth about her client's innocence. Taking justice into her own hands, she furiously sets out to prove the truth, with the help of two young associates. In an excruciating game of beat-the-clock with both the jury and the worst blizzard to hit Philadelphia in decades, Marta will learn that the search for justice isn't only rough - it can also be deadly.