Ms Lynch, who is originally from Gilford, had travelled to Monaghan to stay with her boyfriend at his family home after his brother died.
In the early hours of Saturday 16 March, she was on her way home from a night out with her boyfriend and his friends.
The last confirmed sighting of Ms Lynch was outside a national school about 400 yards from a bridge over the canal where she was found 30 hours later.
Eight months later, Julieanne Lynch said she still has questions about what happened both during the night out and when her daughter was going home to her boyfriend’s house.
“There’s no clarification and there’s a lot of discrepancies," she added. "And I just find it so strange that, you know, eight months on, those answers still have not been given to us.”
A key question in the case is whether Ms Lynch walked off on her own from the national school towards the bridge.