A 17-year-old has been charged with the murder of Constable Stephen Carroll in Craigavon, Co Armagh earlier this month.
The teenager is also charged with possession of a firearm with intent to endanger life, membership of the Continuity IRA and the collection of information likely to be of use to terrorists.
He is due to appear at Lisburn Magistrates Court tomorrow morning.
Earlier, two men arrested over the murder of Constable Carroll were released without charge.
The men, aged 31 and 27, had been questioned by police for seven days about the murder of the 48-year-old officer.
The Continuity IRA said they were responsible for the murder of Constable Carroll.
Four other people arrested for questioning about the murder, and four detained over the murders of two soldiers - 21-year-old Patrick Azimkar and 23-year-old Mark Quinsey - remain in custody.
The Real IRA claimed responsibility for murdering the soldiers as they collected a pizza from a delivery driver at the gates of the Massereene Barracks in Antrim earlier this month.
Six of those still in detention have launched a High Court action in Belfast challenging their extended detention.
They are the first people to be held in Northern Ireland under the Terrorism Act of 2006, which means they can be held for up to 28 days.
One of those being held, Colin Duffy, was present in court but the judges granted anonymity to the other five.
Lawyers representing the six are seeking an urgent judicial review on the basis that their extended detention is unlawful and breaches their right to liberty under the European Convention on Human Rights.
The three judges are expected to rule tomorrow whether the judicial review can go ahead and test the legislation.
