Manouchehr Masoudi was born in Isfahan and studied law. Before the revolution, he represented numerous political prisoners as a lawyer and was actively involved during the revolution. During Abolhassan Banisadr's presidency, he served as a legal advisor to the president. During this period, he exposed several cases of human rights violations and corruption.
His revelations led to his arrest on 15 June 1981. He was subjected to torture, and forced confessions were obtained from him, which were broadcast on television. Initially sentenced to ten years in prison, his sentence was ultimately changed to execution, and he was executed by firing squad on 18 October 1981.
منوچهر مسعودی در اصفهان متولد شد و در رشتهٔ حقوق تحصیل کرد. او در دوران قبل از انقلاب وکالت شمار زیادی از زندانیان سیاسی را به عهده گرفت و در دوران انقلاب فعالانه حضور داشت. در دوران ریاست جمهوری ابوالحسن بنی صدر، به عنوان مشاور حقوقی رئیس جمهور فعالیت می کرد. در این دوره، او موارد متعددی از نقض حقوق بشر و فساد را افشا کرد.
افشاگری های او منجر به بازداشتش در ۲۵ خرداد ۱۳۶۰ شد. وی تحت شکنجه قرار گرفت و از او اعترافات اجباری گرفته شد که از تلویزیون پخش گردید. در ابتدا به ده سال حبس محکوم شد، اما در نهایت حکم اعدام برای او صادر شد و در ۲۶ مهر ۱۳۶۰ تیرباران شد.
