NEW : When Gen. Esmaeel Ahmadi Moghadam , commander of Iran 's security forces , announced the arrest of the warden , he also said no one died at Kahrizak from physical abuse and that the inmates died from illnesses . Police say defendants are scapegoats in effort to build support , maintain order . Three charged with murder in beating deaths of protesters imprisoned after protests . Iran : Enough evidence exists to prosecute 12 prisoners from Tehran 's Kahrizak prison . Officials initially said protesters died of meningitis ; later found they died after severe torture .
NEW : Police say defendants are scapegoats in effort to build support , maintain order . Three charged with murder in beating deaths of protesters imprisoned after protests . Iran : Enough evidence exists to prosecute 12 prisoners from Tehran 's Kahrizak prison . Officials initially said protesters died of meningitis ; later found they died after severe torture .