Following the coup in 1953, a government under General Fazlollah Zahedi was formed which allowed Mohammad Reza Pahlavi, the last Shah of Iran (Persian for an Iranian king), to rule more firmly as monarch. He relied heavily on United States support to hold on to power. According to the CIA's declassified documents and records, some of the most feared mobsters in Tehran were hired by the CIA to stage pro-Shah riots on 19 August. Other men paid by the CIA were brought into Tehran in buses and trucks, and took over the streets of the city. Between 200 and 300 people were killed because of the conflict. Mosaddegh was arrested, tried and convicted of treason by the Shah's military court. On 21 December 1953, he was sentenced to three years in jail, then placed under house arrest for the remainder of his life. Other Mosaddegh supporters were imprisoned, and several received the death penalty. After the coup, the Shah continued his rule as monarch for the next 26 years until he was overthrown in the Iranian Revolution in 1979.