The home of a man questioned today about the murder of a missing retired librarian in Northern Ireland has been searched.
Officers took away a number of items from the house where he lived with his parents.
The man, aged 21 and unemployed, from the Sion Mills area near Strabane, Co Tyrone, is being interviewed about the disappearance of Attracta Harron, aged 65, over three months ago.
Forensic tests have also been carried out on the remains of a burned-out car found soon after her disappearance.
Even though Mrs Harron’s body has never been recovered, police are treating the case as murder.
The man, who is being questioned at Antrim police station under the Police and Criminal Evidence (Northern Ireland) Act, can be held for up to four days.
Mrs Harron from Strabane went missing on December 11 on her way home from Mass in the neighbouring town of Lifford, just across the border in Co. Donegal.
Her husband Michael, 65, a retired schoolteacher said today he did not want to make any comment on the latest stage of the police investigation.
A spokeswoman for the Police Service of Northern Ireland said: “Police are keeping an open mind as to the motive but it’s not believed to be sectarian.”
Detectives launched a murder inquiry after failing to find Mrs Harron’s body during extensive searches of three rivers in the Strabane and Lifford areas.
They are trying to trace the drivers of two cars which were spotted around the time she is believed to have gone missing.
One of them was seen speeding away from the Sion Mills area towards the Donegal border with a woman in the front passenger seat who was reportedly bleeding from a head wound.
The other had been parked between Lifford and Strabane close to where a woman who fitted Mrs Harron’s description was seen standing beside it.