A fifth person has been arrested in connection to alleged witness intimidation during the Detective Garda Adrian Donohoe murder trial.
In August, Aaron Brady of Crossmaglen, County Armagh was convicted of the capital murder of Detective Donohoe outside a County Louth credit union in January 2013.
During the trial an investigation began into claims of witness intimidation - which included allegations of a mobile phone being used in prison.
Four people who had been arrested in connection to the investigation have all been released without charge.
This morning, a fifth person was taken into custody, and is being questioned at Bridewell Garda Station in Dublin