The Garda Commissioner is warning the five members of the gang involved in Adrian Donohoe's murder - to "keep looking over your shoulder".
The 41-year-old Detective Garda was shot dead during a robbery at the Lordship Credit Union near Dundalk in Louth a year ago tomorrow night.
Martin Callinan says Gardai know the identities of the people who carried out the attack - but he says people are shielding the suspects.
Over two thousand statements have so far been taken and around four hundred thousand hours of CCTV footage examined as part of the inquiry.
The Garda Commissioner is appealing to people on both sides of the border with information to come forward - insisting they will be protected:Footage of the Garda Commissioner Martin Callinan speaking at Dundalk Garda Station:
