A 23 year old woman has been arrested in connection with the death of Vincent Maher in Dublin's Finglas last Saturday.
Mr Maher's body was discovered in an apartment on Wellmount Road.
The woman detained this afternoon is being held under Section 30 of the Offences against the State Act at Finglas Garda station.
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Another woman who was arrested on Friday has been released from Garda custody this afternoon without charge.
A file will be prepared for the Director of Public Prosecutions.