[3] After the victory of the Iranian Revolution in 1979, Fallahian was appointed a judge in Islamic Revolutionary Courts, and condemned to death by hanging many former officials of the Shah's regime.

From 1986 to 1988, Fallahian was appointed by Ruhollah Khomeini as Chief Prosecutor of the Special Court for the Clergy and led the trial against Mehdi Hashemi, while from 1988 to 1989 he was Head of the Inspectorate of the Armed Forces of Iran.

[7] Running with the campaign slogan of "Advanced Islamic Country", he said that his top priority would be the economy, focusing on fighting inflation and lowering the unemployment rate.

[11] The arrest warrant is based on the allegation that senior Iranian officials planned the attack in an August 1993 meeting, including Khamanei, the Supreme Leader, Mohammad Hejazi, the then Khamanei's intelligence and security advisor, Rafsanjani, then president, Fallahian, then intelligence minister, and Ali Akbar Velayati, then foreign minister.

[12] In addition, he was the subject of an international arrest warrant issued in 1997 in connection with the murder of three Kurdish-Iranian opposition leaders in the Mykonos restaurant assassinations.

In December 2000, appearing before an Islamic Revolutionary Court, investigative reporter Akbar Ganji "ending months of guessing and expectations from both the authorities and the public" when he announced the "Master Key" to the chain murders of four dissident Iranian intellectuals was Fallahian.