He returned to UNAM in 1971 to the National School of Law where he attended until 1976, leaving without completing his degree.
Originally a member of the Mexican Communist Party, he became a political prisoner in 1966 apprehended in the Universidad Michoacana de San Nicolás de Hidalgo in Michoacán on October 8 of that year.
Talamantes was imprisoned on charges of property damage to the nation.