Gardaí in Co Donegal are continuing to question a woman in her 50s over the death of pensioner Seamus Doherty.
Last night gardaí released a man in his 40s who had also been detained over the death of the 67-year-old.
A file will now be sent to the Director of Public Prosecutions.
Mr Doherty died at a house near Churchill village in the early hours of last Sunday morning.
A murder inquiry was launched after a post mortem found he had died in suspicious circumstances.