Carlow Gardai are now appealing to a couple walking in the Pollerton road area in the early hours of Sunday morning to come forward.
It comes as investigations continue into how a woman ended up unconscious in the grounds of Pollerton castle.
She was found on Sunday afternoon but Gardai believe she’d been assaulted in the early hours and may have been lying there since.
They’ve already appealed to drivers who might have been travelling in the area and now want to speak with a man and woman who were walking.
Anyone with information is asked to get in touch with Carlow Garda station where an incident room has been set up.
You can contact them on 059 9136620 or on the confidential line 1800 666 111.