Dr. Krueger graduated from Harvard Medical School in1977; he is board certified in Internal Medicine (1980), Psychiatry (1984), and has received added qualifications in Forensic Psychiatry (1996) and Addiction Psychiatry (1997). He currently is an Associate Clinical Professor of Psychiatry in the Department of Psychiatry, Columbia University, College of Physicians and Surgeons; he is the Medical Director of the Sexual Behavior Clinic, New York State Psychiatric Institute; and he is an attending psychiatrist at Columbia-Presbyterian Medical Center and at New York State Psychiatric Institute. He currently is active in the teaching of Columbia medical students and psychiatric residents and is on the faculty of the Columbia-Cornell Fellowship in Psychiatry and the Law.He is a member of the American Academy of Psychiatry and the Law, the International Academy of Sex Research, the Society for Behavioral Neuroendocrinology and the Association for the Treatment of Sexual Abusers.He has published in the areas of biological psychiatry and paraphilias.