Everything you need to understand or teach I Will Find You by Harlan Coben.
In Harlan Coben's novel I Will Find You, David Burroughs is serving a life sentence for murdering his three-year-old son Matthew. Although the evidence against him is overwhelming, David insists upon his innocence. Everything changes for David, however, when five years into his sentence, his sister-in-law shows him a photo of a boy the two believe is Matthew. David begins an epic journey thereafter to discover the truth. Written from the first and third person points of view, this thriller explores themes including guilt, memory, and redemption.