Jim Warner Wallace visits PORTICO Mississauga this week. J. Warner Wallace is a cold-case homicide detective, popular national speaker and best-selling author. He continues to consult on cold-case investigations while serving as a Senior Fellow at the Colson Center for Christian Worldview. He is also an adjunct professor of apologetics at Biola University and a faculty member at Summit Ministries. J. Warner was a conscientious and vocal atheist until the age of thirty-five, when he took a serious and expansive look at the evidence for the Christian Worldview and determined that Christianity was demonstrably true.