Casey is a native of Dallas, Texas, where he was born and raised. He attended Dallas ISD schools and graduated from Skyline High School.
He went to college at the University of North Texas, where he graduated with a Bachelor of Business Administration degree. He served as Vice President of the Progressive Black Student Organization. He also was elected to the Student Government Association. While a student at UNT, he became a member of Kappa Alpha Psi, Fraternity, Inc. (Zeta Upsilon chapter). He helped to charter the National Pan-Hellenic Council on the campus of the University of North Texas. He also laid the groundwork for expanding the Buddy System, a student mentoring program that is designed to increase retention of students of color by pairing incoming freshmen with upper classmen.
After graduation, he became an educator. He has spent his career in education, working in Cedar Hill ISD and Dallas ISD. While in Dallas ISD, he established the Young Men of Distinction Male mentoring program, at A. Maceo Smith High School in 2000. He was a special education teacher in Dallas ISD.
He also is the President and CEO of CLT Consulting, an educational and political consulting company. He serves as a deacon at True Lee Missionary Baptist church in Dallas and is the Sunday School Superintendent.
Casey was the youngest President of the Dallas branch of the NAACP in the ninety year history of the organization. Under his leadership, several community partnerships were formed. He also has served on the Mountain Vista II homeowner association board, and he currently serves as the crime watch chair for his neighborhood. He served on the City of Dallas Community Development Commission for ten years, most recently as the chair. He writes a weekly column in The Dallas Examiner.
He is married to LaKisha Thomas, an assistant principal at an elementary school. He is the father of two sons, Chad and Cornell West Thomas.