Four people have been arrested in connection with alleged witness intimidation and other matters arising from the recent trial of Aaron Brady.
The 29-year-old, from Crossmaglen, Co. Armagh, was convicted in August of the capital murder of Detective Garda Adrian Donohoe.
In January 2013, the detective was shot dead during an armed robbery outside Lordship Credit Union in Co. Louth.
Aaron Brady was found guilty of taking part in the armed robbery, and of shooting the on-duty detective from close range.
His sentence hearing is due to take place next week.
During the trial, the Garda National Bureau of Criminal Investigation began looking into claims of witness intimidation.
They also investigated allegations of attempts to pervert the course of justice and the unlawful use of a mobile phone in prison.
On the back of their investigation, four arrests were made today and they’re being questioned at various Garda stations across Dublin.
*Reporting by Frank Greaney
