This research was supported by the National Institute of Justice (grant number 2005-IJ-CX-0035), the National Institute of Mental Health (MH48165, MH62669), and the Centers for Disease Control and Prevention (029136-02). Additional funding for this project was provided by the National Institute on Drug Abuse, the National Institute on Alcohol Abuse and Alcoholism, and the Iowa Agriculture and Home Economics Experiment Station (Project #3320).