[5] His family had extensive agricultural land at Sazak village in the Mihalıççık district of Eskişehir Province.
[5] At the 1977 general election, Sazak unsuccessfully ran for an Eskişehir Province seat in the parliament, representing the MHP.
[5] During the formation of the 41st government (the so-called Second Nationalist Front coalition cabinet) of Süleyman Demirel, Sazak was appointed Minister of Customs and Monopolies despite not being member of the parliament.
[2][5] Sazak reduced arms trafficking conducted by organized crime and terrorism and imported cigarette smuggling.
[5] Another political opponent CHP stated during the 1978 budget debates that Sazak is the only person, who had stopped the "robbery" at the customs since the foundation of the Republic.
[2] Gün Sazak's official police guard was removed by an order of the martial law commander in Ankara.
[11][12][13] Instructed by Gül, Özcan phoned the newspapers Milliyet and Tercüman and gave notice of Dev Sol's responsibility for the assassination.
[11] The fugitives Eranıl, who was the organization's Ankara office chief, Cemal Kemal Altun, a co-planner of the assassination, and Gül fled abroad after the military coup on 12 September 1980.
[13] Altun was arrested in Germany on 5 July 1982 in connection with the assassination of former Turkish prime minister Nihat Erim.
[13] However Altun committed suicide by jumping from the sixth floor of the courthouse in West Berlin, Germany on 30 August 1983 to prevent his extradition to Turkey.
[5][11][13] In January 2013, a report of the National Intelligence Organization of Turkey (MİT) revealed that the assassination of Gün Sazak was instructed by Dursun Karataş (1952–2008), the leader of Dev Sol.