20 years of DUI / CRIMINAL Law Experience Criminal defense attorney Katherine “Trina” Griffiths, has the knowledge, expertise, and experience to successfully fight for your rights. With nearly twenty years of criminal law experience throughout the state of Georgia, Trina is an exceptional advocate for anyone undergoing the often daunting criminal justice system. Trina scored 95th percentile on the National Bar Exam following her graduation from law school. Whether you face a DUI, drug, misdemeanor or felony charge or a probation violation, Trina represents each and every client with skill, integrity, and strength. Trina is a member of the National College for DUI Defense, a member of the Cobb County Bar Association, has participated in the national DUI defense seminars at Harvard Law School, taught at ICLE DUI seminars, and has successfully argued before the Georgia Supreme Court and the Georgia Court of Appeals.