Tonight’s show author of Diary of an American Exorcist Msgr. Stephen J. Rossetti, Ph.D., is the President of the St. Michael Center for Spiritual Renewal and a research associate professor at the Catholic University of America in Washington, D.C. A licensed psychologist and the author of several books, Msgr. Rossetti has participated in hundreds of exorcisms. During his journey to priesthood, he experienced a spiritual episode in which, “in two seconds I learned 80 percent of what an exorcist needs to know.”