The Devil You Knew by Mike Cobb

Atlanta. 1963. Three adolescent girls go missing. And a killer is on the loose.
Young Billy Tarwater, eleven years old at the time and infatuated with one of the girls, thirteen-year-old Cynthia Hudspeth, finds himself caught up in the drama and suspense of the kidnappings.
Fast forward to 1980. Tarwater, now an up-and-coming newspaperman, sets out to find the killer and free an innocent victim of injustice.
The Devil You Knew masterfully combines coming-of-age poignancy with the cliffhanging suspense of a noir thriller.
The reader is taken on a journey of twists and turns to an unexpected end.