J. Warner Wallace ' Jim Wallace ' was a police detective and an atheist until he was 35 years old. Then he started examining the claims of Christ and of Scripture with the hard-nosed skepticism of his police training. The result is that he became a Christian. Nearly 20 years later and after retiring from police work, he wrote "Cold Case Christianity." It has taken the apologetics world by storm, selling more than 100,000 copies and giving Jim Wallace the chance to write more books on Christian apologetics that take the same approach: the approach of a skeptical, hard-nosed detective examining evidence for the claims of Christianity. Those books include "Alive: A Cold-Case Approach to the Resurrection" and "God's Crime Scene: A Cold-Case Detective Examines the Evidence for a Divinely Created Universe."