A man who is facing extradition to the US to stand trial for killing three students in a car crash is to challenge the order in the Supreme Court.
The High Court last month ordered that Frederick Russell (27) be returned to the States after more than four years on the run.
But lawyers for the 27-year-old have filed a notice of appeal and the challenge is expected before the Supreme Court in the next fortnight.
Mr Russell is wanted to stand trial in Washington State over a fatal pile-up in June 2001 which claimed the lives of three college students and left three others with permanent injuries.
The SUV Mr Russell was allegedly driving at high speed ploughed into two other cars on a highway near the Idaho border.
Several students from the nearby state university were returning to campus by car after a trip to the cinema when suddenly the vehicle pulled into their lane and smashed into their car.
During the extradition hearing it emerged Mr Russell had been drinking and using cannabis in the hours before the fatal accident.
Mr Russell, who had been using an alias as he worked and lived in Ireland for the last number of years, is wanted to stand trial in the US on three counts of vehicular homicide, similar to causing death by dangerous driving.
If found guilty he could end up serving life in jail.
