At a cross-border conference in Dundalk last week between An Garda Siochana and the PSNI, Garda Commissioner Martin Callinan said there have been over 3,600 lines of inquiry in the Detective Garda Adrian Donohoe murder.
The annual conference is held by both forces to look at possible criminal threats and exchange intelligence information on cross border crime.
“This is to ensure that this type of crime is, as far as possible, eliminated through effective crime prevention methodologies and ensuring all possible leads are thoroughly and professionally exhausted regardless of where it emanates from, be it north or south of the border,” the Commissioner said.
Commissioner Callinan revealed details of how the investigation into the Donohoe murder is progressing when he met PSNI Chief Constable Matt Baggott.
Mr Baggott said there was nowhere his officers will not go to bring people to justice.
He was referring to suggestions that the PNSI are reluctant to investigate criminal activity in the south Armagh area, where the murder gang is believed to be based.
“There is nowhere we won’t go to bring people to justice,” he said.