[3] A career criminal for most of his life, in 1984 Roháč was sentenced to 15 years for terrorism under communist Czechoslovakia for kidnapping the Deputy Minister of Health and attempting to take him out of the country.
In April 2011, Roháč was extradited to Hungary,[4] where he faced charges for multiple assassinations: Ferenc Domák, pander in 1996, János Fenyő, media magnate in 1998, and Tamás Boros, maffia boss in 1998.
Later, he started a career of petty crime: "fights, alcohol, badmouthing the communist regime, policemen and suspended sentences" recalls Roháč in the early 1990s.
Jozef Roháč committed his first high-profile crime in 1985, in communist Czechoslovakia, when armed, he kidnapped the Deputy Minister of Health to negotiate the crossing of the border to escape from the country.
Roháč later claimed that he decided to surrender after Kováč's health had begun deteriorating in the car due to missing pharmaceuticals.
Jaroslav Toman, husband of future Minister of Labour of Slovakia Viera Tomanová, who worked as a high ranking police officer in Bratislava at that time was one of the engaging policemen and Roháč's bullet allegedly missed him only narrowly.
When interviewing Tomanová, she declared that her husband was scared of Roháč for the rest of his life and that her whole family was threatened at that time.
He earned a reputation of professionalism in planning, preparation, realization and evidence removal and he was known to have a 100% success rate (although there is at least one publicized case of one of his explosive devices falling off the car allowing the target to survive).
Róbert Remiáš, an ex-police officer, was the person through which Oskar Fegyveres communicated in a key political lawsuit of the 1990s Slovakia.
Fegyveres was an ex-secret agent who gave testimony in the case of kidnapping of the son of the President of Slovakia, Michal Kováč Jr., into Austria.
Fegyveres described the involvement of Prime Minister Vladimír Mečiar and Director of Slovak Information Service Ivan Lexa in this crime.
The Deputy Director of Slovak Information Service Jaroslav Svěchota gave the order to assassinate Remiáš to the boss of Bratislava mafia at that time, Miroslav Sýkora.
The explosion did not kill Remiáš immediately, as evidenced by fumes found in his lungs and witness accounts of hearing him scream, but he did die shortly after.
Bratislava regional prosecution, complying with the investigator, dropped the charges against Jozef Roháč and Imrich Oláh in 2006 in relation to the murder of Róbert Remiáš.
The first attempt to assassinate Holub in the spring of 1997 failed after a group of Černák's armed henchmen got caught by the police while leaving their house to do the job.
Roháč and the other Černák's gang members present at the scene threw their guns in one of the flower pots in front of the hotel and fled.
[8] On February 6, 1997, a group of assassins killed the ruling boss of local mafia Miroslav Sýkora in front of the Holliday Inn hotel in Bratislava.
On May 9, 1998 an explosion equivalent to 5 kilograms of TNT killed Eduard Dinič near Zlaté piesky in Bratislava, some minutes before 8 pm.
Dinič was aware his life was in danger and he was already preparing to go into hiding and on this day, he wanted to go play tennis for the last time before heading out of the country.
Roháč placed the explosives underneath concrete tiling of the narrow pavement leading to the tennis courts where Dinič was known to cross.
According to Alena Toševová from the Regional Police Directorship in Bratislava, "investigation was interrupted because there were no findings allowing to press charges against any individuals".
Jozef Roháč and Ivan Cupper stormed out of the van and opened fire from their submachine guns at Dinič and his bodyguard Marián Fojtík as they entered Róbert's car.
[13] The Budapest Police Headquarters suspected Jozef Roháč and other gang members of committing the attack, however, the investigation ended in 2002 as it failed to provide evidence.
Ružič frequented a bar called Astra so Lališ decided to plant an explosive device next to the entrance and hired Roháč to do this job.
For this purpose, Lališ's men even used a hidden camera to record Ružič's patterns of behavior and constructed a door overhang to hide the explosive.
Roháč remotely detonated the explosive device on December 2, 2004, at about 1 p.m. when Ružič approached the door accompanied by his bodyguards.
[6] Jozef Roháč was arrested in Hungary in 2008 on charges of an attempted assassination of businessman Zoltan Seres in June 1997 and finished serving his sentence in October 2010.
On May 4, 2011 the Chief Prosecutor's Office in Budapest has launched an inquiry into delays in identifying the DNA after recently refusing to accept an explanation by the National Bureau of Investigation.