The father of two young Hungarian children, who were killed when they were hit by a car driven by an Irishman near Budapest 12 years ago, has vowed to continue seeking justice.
Bence Zoltai also heavily criticised the Irish authorities for failing to assist him and his family to achieve justice.
Ciaran Tobin, 48, of Offington Drive, Sutton, Co Dublin, was sentenced in his absence by a Hungarian court to three years in prison for negligent driving over the incident in April 2000.
It resulted in the deaths of two-year-old Petra Zoltai and her five-year-old brother Marton.
Since his conviction, the Hungarian authorities have been seeking to have Tobin extradited to serve his sentence.
The first attempt in 2004 failed as the courts ruled Tobin had not fled Hungary.
A change in legislation followed in 2009. However, nine days ago, the Supreme Court ruled that a second extradition request should also fail.
Mr Tobin had offered to serve his sentence in Ireland and voluntarily went into custody in November last year.
However, during the appeal the Supreme Court heard there was no provision under Irish law to allow him to serve his sentence in Ireland.
Speaking in Dublin, where he travelled from his home in Hungary to raise the profile of the case and seek help from the Irish people, Mr Zoltai said he was shocked at the Supreme Court decision.
He said he had been 100% sure that Tobin would be extradited following the High Court's second decision.
He said at first he did not understand what had happened, until he read media reports of the Supreme Court decision.
The 47-year-old insurance broker said he hopes the story is not closed.
The matter is now with the EU authorities and an EU official had recently asked the Irish and Hungarian justice ministers to sit down and discuss the issue, he added.
He said he would still like to see Tobin at least start his sentence. But if that cannot happen he wants to try to ensure something like this can never happen again.
Mr Zoltai also criticised the Irish authorities, saying both he and his lawyer had tried to contact them over the years in relation to the case, but got almost no response.
As a result, he said they were not even told when the next hearing would happen and so could not get to Ireland in time to express their views.
Mr Zoltai said he would like Tobin to personally apologise for what he had done as it would help the family reach closure.
He said the Irishman had sent a telegram around the time of the children's funerals, but that was not enough.
If Tobin had served his sentence he would have been out of jail a long time ago, and the story would be closed, he added.
Mr Zoltai's wife has given birth to another boy since the couple's first two children were killed.
But he said he remembers his other two children as kind, like any children of that age, and added that he and his wife will always love them.
He said it would be nice for the family to reach some sort of closure.
Mr Zoltai also appealed to anyone in Ireland who could give the family legal advice about what avenues they could still explore to contact him.
