The man, who has links to the Tullamore area, is being treated in hospital.
Gardaí investigating the murder of Ashling Murphy still don't know when they'll be able to question their main suspect.
The man, who has links to the Tullamore area, is being treated in hospital for a number of injuries.
Investigators have taken a sample of his DNA to see if it will match samples from the crime scene in Tullamore.
Conor Lally, crime and security editor with the Irish Times, says it may be a few more days before gardaí can formally question him:
15 families across Laois, Offaly and Westmeath have benifitted from a donation of food from the Murphy family to the Ken Smollen Food Appeal.
Ken, who also serves an independent councillor in Offaly, says he was moved by their generosity in such tragic circumstances: