Leon was born in St. Louis, Missouri on November 26, 1941. He has four siblings, three brothers, Alan Guinn, Loren Guinn(d), Bill Guinn and one sister, Rosanne Griffith.
He graduated from California State University at Fresno in 1965 with a Bachelor's degree and a Master's degree in Criminology.
He married Ginny Shepherd in 1966. They have two children, Wendy Malavé and Kevin Guinn.
He began working for the United States Customs Service In 1966 and retired in 1998 as the Special Agent in Charge of the Houston office. He took time off for a stint in the US Army, Military Intelligence from 1967 to 1970.
After retiring from Customs, he served as the Director of Internal Affairs for the Texas Department of Criminal Justice before retiring for good.
He loved retirement and having time for traveling and pursuing his passion of photography.
