A child's car seat could be the key to tracking down the killers of a police officer shot dead in a botched robbery in the Republic.
Details of the crucial clue emerged as investigators made a renewed appeal for information over the gang's getaway car, found burnt out in Northern Ireland.
Garda Adrian Donohoe was shot dead during a robbery at the Lordship Credit Union outside Dundalk on January 25.
The hunt for his killers is focused on a dark blue Volkswagen Passat car found in south Armagh shortly after the heist. Police believe the gang travelled from Dundalk across the border to Fews Forest outside Newtownhamilton.
Detectives said a red and black mallet-style hammer, normally used in the motor trade, was recovered at the scene. They also said a green and black Cosatto child car seat was in the car when it was stolen. But detectives said it was missing when the car was found. Officers from the PSNI's Serious Crime Branch are assisting An Garda Siochana.
PSNI detectives have made a specific appeal for information on the movements of the Passat in and around Newtownhamilton on the night of January 25.
They are particularly focused on sightings around Chalybeate Road junction with Cortamlet Road; Cortamlet Road junction with Blaney Road; Keady Road junction with Chalybeate Road, and Tullygeasy Road junction with Keady Road.
Anyone with any information is asked to contact detectives in PSNI on 0845 600 8000 or anonymously on 0800 555 111. In the Republic, ring gardai on 042 9388470 or the confidential number on 1800 666 111.
Det Adrian Donohoe was gunned down during a robbery at a credit union in Dundalk, Co Louth, on January 25. The gang shot Mr Donohoe then held his colleague, Detective Garda Joe Ryan, at gunpoint while they robbed the Lordship Credit Union. They stole €4,000 (£3,600) in cash.