Missing vet Catherine Gowing's burned-out car has been found close to her home in New Brighton, Flintshire.
It was found at about 7.15pm on Thursday after a member of the public contacted police.
A 46-year-old man from Gwynedd remains in police custody after being arrested on suspicion of her murder on Tuesday night.
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The derailed tram trapped around a dozen people after hitting the building in evening rush-hour.
Heavy rain and strong winds will spread east across the UK today, buffeting up against cold air.
The Irish weather service named the storm on Saturday night.