The Whole Truth — James Scott Bell

At the age of five, Steve Conroy saw his seven-year-old brother kidnapped from the very bedroom they shared. His brother was never found. And the guilt of his silence that night has all but destroyed Steve's life.
Now thirty years old with a failing law practice, Steve agrees to represent convicted criminal Johnny LaSalle, an arrangement sweetened by a lucrative retainer. It's not long until he discovers that this con man might just be his missing brother.
Desperate for his final shot at redemption, Steve will do anything to find the truth. But Johnny knows far more than he's telling, and the secrets he keeps have deadly consequences. Now Steve must depend on an inexperienced law student whose faith seems to be his last chance at redemption from a corrupt world where one wrong move could be his last.