The sister of Ashling Murphy has paid tribute to her on social media ahead of her funeral on Tuesday.
Amy Murphy said her sibling was "the light of our lives" on her Facebook page
Ashling's funeral mass is set to begin at 11am on Tuesday, and on the eve of it, Amy took to her page to write a heartfelt tribute.
She said: "Ashling was the light of our lives and the heart of our family. Sadly we will lay her to rest tomorrow, Tuesday the 18th of January.
"Our family kindly asks that any musicians attending please bring their instrument and play music at lower town cemetery after mass should you wish."
The 23-year-old's funeral Mass will be held in St Brigid's Church in Mountbolus at 11am on Tuesday with her burial afterwards in Lowertown Cemetery.
The funeral cortege will leave Ashling's home at 10.30am before arriving at the church.
As that is happening, Gardai will be focusing on two bits of evidence they believe to be key to the probe.
Gardai have also asked anyone who saw a man dressed in black tracksuit top with no hood, black tracksuit bottoms with a large white stripe or white writing on the side and black runners to come forward.
Officers have asked members of the public whether they saw this man walking in the Tullamore area, or if they gave the man a lift on the evening last Wednesday.
The public has also been asked if they noticed him loitering at any location or “involved in any activity which drew your attention”.