Mr Mousavi, the defeated candidate in last June’s presidential election, served as Iran’s prime minister when Ayatollah Ruhollah Khomeini, the regime’s spiritual leader, issued a fatwa that sentenced thousands of political prisoners to death without trial, according to the report by one of Britain’s leading human rights lawyers. Mr Mousavi is one of several prominent Iranian politicians who are accused of implementing the order. According to a detailed report published by Geoffrey Robertson QC, who specialises in human rights law, the prisoners were executed for refusing to recant their political and religious beliefs. >>>