John served five two year terms in the House of Representatives in Austin. Shields has received a Bachelor of Arts from Duke University in Durham, North Carolina and a Masters of Arts from Trinity University in San Antonio. In 1988, Shields received the Juris Doctor degree from St Mary's University School of Law in San Antonio. In addition to his law practice, Shields is currently a professor at the University of Texas at San Antonio. He is an expert in constitutional law and political science. Mr Shields is happily married to Marsha Shields. They have one lovely daughter and one adored grand baby.