The man arrested in connection with the murder of Jean Quigley is back in garda custody in Donegal.
The 36-year-old was taken to hospital after complaining of feeling unwell while in custody.
He was arrested in Donegal on Tuesday night and was brought to Ballyshannon Garda station.
Jean Quigley, a mother of four who was pregnant with her fifth child, was beaten to death at her home in Derry on 26 July.
