Teenage political Prisoners in the Islamic Republic Tehran's Evin prison, most of Evin prison prisoners who have been executed from The 1980s, particularly the period between 1980 and 1988, are the darkest and bloodiest in the history of contemporary Iran. In 1980, the country was still in the grip of the chaos of the 1979 Revolution. Shah Mohammad Reza Pahlavi had been toppled, Tehran-Iran 1980