Early period

He started working as a social work clerk in municipal administrations and became a member of the League of Communists of Yugoslavia in 1974.^[1][4] He became a leading figure in the town of Bačka Palanka in 1981,^[5] while his career later progressed to the level of secretary of the municipal committee of the Communist League in 1986.^[6][7][8] During the party's transformation into the Socialist Party of Serbia (SPS), Kertes became a supporter of Slobodan Milošević.^[1][9] He took part in the 1989 Serbian presidential election, but lost to Milošević in a landslide.^[10][11]

Rise to prominence

Kertes became a prominent figure when, during the anti-bureaucratic revolution in support of Milošević's politics, he initiated the protests in Bačka Palanka and led the protesters to Novi Sad, the capital of SAP Vojvodina. The event, known as the "Yogurt Revolution", led to resignation of the provincial leadership and installation of loyalists to Milošević.^[12] His statement "How can you Serbs be afraid of Serbia when I, a Hungarian, am not afraid of Serbia?" made him particularly famous.^[13] These activities helped his progression to Serbian presidency membership, and in 1990 he was elected to the Assembly of Serbia as a member of parliament for the Grocka—a suburb of Belgrade—although he did not live there.^[7][9] In 1991, he temporarily withdrew from the public eye and, under the auspices of the State Security, on the eve of the War in Croatia, he travelled across Serb-populated areas in Croatia and Herzegovina, distributing weapons to local Serbs. In July 1991, he made another historic statement in Nikšić: "Here we will build a great Serbian state, with the border on the left shore of Neretva and Dubrovnik as the capital".^[3] Subsequently, he was installed as the head of the state security department of the Federal Ministry of Interior, and as the assistant to Federal Minister of Interior Petar Gračanin (1992–93).^[7] Prime Minister Milan Panić removed him from his position after an incident at the London Conference, when it was discovered that he induced Vladislav Jovanović to carry a secret listening device, and that he was listening on the other end.^[3][14] He was linked to formation of Serbian paramilitary units in Croatia (especially in eastern Slavonia) and Bosnia and Herzegovina in 1992 and 1993.^[13]

Kertes' reached the ultimate and the most lucrative peak of the career when he was appointed the head of Yugoslav Customs Office in 1993, a post that he held until 6 October 2000.^[9] That position allowed him to impose whatever tax was necessary on goods, and the customs duties functioned as a state budget in shadow.^[13] They were a financial source for a vast range of operations, including funding the paramilitary units in wars of Croatia and Bosnia and Herzegovina, money laundering in foreign off-shore banks, and filling of private pockets of people close to Milošević.^[13] He had Milošević's trust throughout his tenure.^[3] UN sanctions meant that the entire lucrative turnover of goods, especially such as tobacco and oil, had to be effectively smuggled, a privilege that was given only to a select few. Milošević's son, Marko, had an effective monopoly of dealing Phillip Morris cigarettes in FR Yugoslavia.^[13] From his position, Kertes distributed an enormous number of gifts, chiefly vehicles and luxury goods, and the beneficiaries ranged from underdeveloped villages, through various state and local officials, to various special police, military and paramilitary units.^[13] During his reign, he was a man of unlimited power in his hometown Bačka Palanka.^[13] Apart from his love of fishing using nets and dynamite, he is also remembered for driving an armoured limousine to his mother's house through the town. He had the power to sack whoever he did not like, and provided benefits to loyalists. The town provided around 800 customs officials out of 2300 the country's total during his mandate.^[13]

Fall from power

After the overthrow of Slobodan Milošević on 5 October 2000, activists of the Democratic Opposition of Serbia broke into the customs headquarters, where they found Kertes and his associates shredding documents. Other items found in the suite included US$ 1.3 million in various currencies, 18 pounds of drugs, about 50 weapons, and ten bulletproof luxury cars. After a brief detention, Kertes was permitted to leave the office, but subsequently faced various charges.^[13] After two retrials, in February 2007, Kertes was sentenced to 2.5 years in prison for providing a truck to the executioners of opposition politicians in the 1999 Ibarska magistrala assassination.^[15]

In September 2007, he faced trial for abuse of office and embezzlement. Among other crimes, the prosecution charged the group, consisting of Milošević, Jovan Zebić, and Nikola Šainović with transferring 120 million German marks to Cyprus banks, where the trace was lost. Only Kertes faced trial, as Milošević and Zebić died, and Šainović had been standing trial in International Criminal Tribunal for the former Yugoslavia in The Hague.^[16] In November 2012, the Appellate Court reached its final verdict of six years and six months in prison for Kertes for illegal transfer of money to Cyprus and embezzlement of state budget for 1.5 million dinars. The sentence was joined with the previous one of 1.5 years for his participation in the Ibarska magistrala assassination. He was absolved of charges of "joint criminal venture" with Milošević, Zebić and Šainović.^[17] However, in March 2013, the Supreme Court of Cassation reversed the verdict and ordered a reconsideration by the Appellate Court.^[18] In August 2014, he was released of all charges of embezzlement due to absolute obsolescence.^[19] Kertes also faced several trials for tobacco smuggling during the 1990s and "abuse of official role". In December 2015, the Appellate Court reached a final verdict of 2.5 years in prison in one such case.^[20] In the same year, it was reported that he had left SPS and joined the Serbian Progressive Party.^[5][9][21]