A woman has been arrested in connection with an alleged fatal assault which reportedly took place in the Slieve League/Killybegs area between 24th and 25th June.
The woman, in her 20s has previously been arrested in connection with the investigation.
The woman is currently detained at a Garda Station in Donegal under Section 4 of the Criminal Justice Act, 19.
The body of 60-year-old Robert Wilkins was found dead on 3rd July following a major search operation.
Alan Vial, with an address in Killybegs was later arrested and charged with Mr. Wilkin’s murder before a special sitting of Ballyshannon District Court in July.
He is due to appear in court in September.
