A man has been charged with the murder of Detective Garda Adrian Donohoe (41) more than five years ago.
Aaron Brady (27), of New Road, Crossmaglen, Co Armagh, appeared before a special sitting of Dundalk District Court last night shortly after 8pm.
Mr Brady was charged with the murder of a garda in the course of his duty under Section 3 of the Criminal Justice Act 1990.
When charged, he replied: "I strongly deny any involvement in the murder of Detective Garda Adrian Donohoe."
He was wearing a black coat, blue jeans and red runners when he appeared in court.
Speaking in court, Detective Inspector Pat Marry said that the accused was released from detention at 6.57pm last night and subsequently arrested for the purposes of charge at the same time.
The accused was remanded in custody and will appear before Cloverhill District Court on Friday, March 9, at 10am.
It is understood a number of US homeland security members were in court for the hearing.
Det Gda Donohoe's wife, Caroline, also attended the court hearing.
A large crowd had gathered outside the courthouse before Mr Brady arrived and was taken through a side entrance in a garda vehicle.
Det Gda Donohoe - a father-of-two - was shot dead during a botched robbery in the car park of the Lordship Credit Union, on the Cooley Peninsula in Co Louth, on January 25, 2013.
He had arrived on scene with Detective Garda Joe Ryan to act as an armed escort for a staff member depositing a bag of money into a bank night safe.
A State funeral was held for the highly respected garda, with thousands enduring sleet and near freezing conditions to show their respects.
Chief celebrant Fr Michael Cusack, of St Joseph's Redemptorist Church, told the service that Det Gda Donohoe was a loyal, honest, virtuous and faithful man, who laid down his life for his community.
He described him as the "perfect role model for everybody".
The garda's brother, Colm, remembered him as both "big in stature and big in heart".
He added that his brother was "generous to a fault".