Schell was born in Dallas. He received a Bachelor of Arts degree from Southern Methodist University in 1972 and a Juris Doctor from the Dedman School of Law at Southern Methodist University in 1975. He was an instructor at the Dedman School of Law from 1975 to 1976. He was an assistant district attorney of Collin County, Texas in 1976. He was in private practice in McKinney, Texas from 1977 to 1982. He was a Judge of the County Court at Law in Collin County from 1982 to 1986. He was a Judge of the 219th Judicial District Court of Texas from 1986 to 1988.[1]