Welcome to Naturalization and Criminal Offenses, Detention, & Removal: A Legal Guide for Immigrants & Advocates. The American Bar Association Commission on Immigration created this guide for educational and informational purposes only and nothing herein is to be considered the rendering of legal advice for specific cases; readers are responsible for obtaining such advice from an attorney. This guide was not prepared by any agency within the U.S. government, and it is intended to outline the process of becoming a citizen of the United States and to explain some of the obstacles to naturalization for permanent residents currently in federal immigration detention or with prior criminal offenses.