The suspect, who is in his 50s, was arrested shortly after a murder inquiry.
Gardaí fear Kerry grandmother Miriam Burns was beaten to death in her home by someone known to her.
The revelation came as Gardaí launched a murder investigation into the death of the mother of four, who was described as “Killarney’s smiling lady”.
The suspect, who is in his 50s, was arrested shortly after a murder inquiry was launched into her death in Co. Kerry.
The 75 year old grandmother and mother of four was found dead at her home in Killarney on Monday afternoon.
Officers have until potentially tomorrow before deciding whether to charge or release the man.
Ralph Riegel, southern correspondent with the Irish Independent says he's likely to have been familiar to Ms. Burns:

Almost 20,000 Commuters Affected By Major Rail Disruption This Morning
Jury Sworn In For Trial Of Former Sports Coach Accused Of Sexually Abusing Four Girls Across Leinster
Status Yellow High Temperature Warning In Effect For Ireland, As Red Alerts Issued For Europe
Irish Freedom Party Loses Political Party Status
Jobs Under Threat At Diageo, As Drinks Giant Informs Government Of Potential Lay Offs
Almost One Third Of Families In Arrears On Energy Bills Last Year
New Report Outlines How Vulnerable People Face Increased Challenges When Reporting Sexual Violence
Jeffrey Donaldson Found Guilty Of 18 Counts Of Sexual Abuse