Indeed, in summer 1988, as many as 30,000 political prisoners-none sentenced to death-were murdered, ordered by "Supreme Leader" Khomeini, in a matter of weeks. Key perpetrators, unpunished, are now Judiciary Chief & Justice Minister. Pursue justice for #1988Massacre victims.
As documented in "Iran: Where Mass Murderers Rule," by @ncrius, Khomeini issue a fatwa (decree) that any political prisoner who refused to denounce the main opposition movement, the MEK, should be killed; that was the key question each political prisoner in Iran was asked. 
"If the person at any stage or at any time maintains support for the Hypocrites [the MEK], the sentence is execution. Annihilate the enemies of Islam immediately,” Khomeini responds to then Chief Justice inquiry about his fatwa, clearing all doubts for the massacre.
The massacre was so egregious that Khomeini's own number 2, Ayatollah Hosseinali Montazeri, protested in letters to Khomeini that became public, and led to his ouster and house arrest until he died in Dec 2009.
In an audio file recording of a meeting held on August 15, 1988, with the so called “Death Committee” Montazeri says "Fifty years from now, they may judge us and say that [Khomeini] was a bloodthirsty killer. We have shown the ugly face of the Supreme Leader."
