For 30 years, the disappearance of Llangollen antiques dealer Trevaline Evans has baffled police - and now a memorial to her is proving another mystery.
Walkers strolling along a popular walkway over 30 miles from Llangollen have been puzzled by a plaque fixed to one of several benches.
The inscription reads "In memory of Trevaline Evans Vanished 16/6/1990. Found - Rhuddlan GC 14/3/2019 Removed 19/3/2019 RIP".
But who fitted the metal plaque to the council-owned bench alongside the Prestatyn - Dyserth walkway and why that location was chosen is unknown.
It was put in place some weeks ago and within the past few days has been defaced.
North Wales Live understands it's now been removed.
Mrs Evans, 52, left her shop in Church Street, Llangollen, on June 16, 1990, putting a note in the window saying "Back in 10 minutes".
Her last confirmed sighting was about two hours later near her home in Market Street. Her car was left near the shop and no money was ever taken from her account.
Her disappearance remains a mystery and is being treated as a murder case.
Her husband Richard was arrested at one stage but later released without charge. He died in 2015.
At the time of her disappearance Mr Evans had been working at their bungalow in Rhuddlan where they planned to retire.
Two years ago, acting on information from brothers Andrew and Lee Sutton, North Wales Police dug up the bar at Rhuddlan Golf Club but nothing was found.
The brothers' complaint to the Independent Office for Police Conduct about the police handling of the search was referred back the force and subsequently rejected.
They had bought a camera which, they claimed, showed human remains under the club's floorboards but said the remains had been removed by the time police carried out their investigation.
Andrew, a former chief auditor for Flintshire County Council, now lives in Milton Keynes, and Lee, a carpenter, from Kinmel Bay, remain convinced about what they saw and are considering what steps to take next.
But they deny having anything to do with the plaque on the bench or with a similar sign which was placed close to the Evans' bungalow in Rhuddlan. That was subsequently removed.
Lee Sutton said he had been to see the bench after being told about it by a friend, but added: "It's very strange. I don't know who would do it and why they would choose to put it there."
He said he had been told that shortly before Christmas a group of people held an all-night vigil alongside the bench.
His brother Andrew is equally baffled.
"There is an awful lot more to come out about this but I've no idea who would could be responsible for the plaque or why," he said.
Gary Davies, Denbighshire County Council's countryside officer, who is responsible for the walkway, which follows the route of the former Prestatyn - Dyserth railway, said he was unaware of the plaque.
"But we do have a policy not to allow any plaques on benches because they can become shrines," he said.
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