Here is a television segment produced by Dr. Jerry Newcombe on the conversion story of J. Warner Wallace, a former skeptic, who worked as a homicide detective in Los Angeles. He was challenged to apply his cold case detective skills to Jesus Christ and the Gospels. He ended up becoming a Christian through the process. Wallace has written some books, including Cold Case Christianity and Person of Interest.
Here is his story as seen on Truths That Transform of D. James Kennedy Ministries.