David T. McKenzie was born in Ft. Lewis, Washington, and he has lived most of his life in Oklahoma. He received a Bachelor of Arts degree in Political Science from Southwestern Oklahoma State University, a Master of Science degree and a Master of Arts degree from Northeastern Oklahoma State University, and a Juris Doctorate degree from the University of Oklahoma College of Law in 1988. From 1988 to 1989, Mr. McKenzie was an Assistant City Attorney in Moore, Oklahoma, where his duties included criminal prosecutions and civil municipal defense. He was in private practice from 1989 to 2000, where he specialized in criminal and constitutional litigation. At one time or another, he has represented almost every adult bookstore and gentlemen’s club in Oklahoma City.