For over thirty years, this firm has specialized in criminal defense with emphasis on grand jury, trial and appellate practice. The firm practices throughout the State of Oklahoma in State and Federal Court matters. The firm also practices in numerous other States, both in State and Federal Courts. These have included California , Nevada , Colorado , New Mexico , Nebraska , Texas , Mississippi , Illinois , Michigan , Florida , Iowa , North Dakota and North Carolina . Mr. Martin is an active lecturer in continuing legal education seminars throughout the State of Oklahoma for various different groups and bar associations. For over 20 years. Mr. Martin has been listed in the Bar Register of Preeminent Lawyers and The Best Lawyers in America . Martin Law Office has also been listed as a Super Lawyer in Oklahoma since 2006.