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 pupil was rushed to hospital after collapsing during an 800m race on Thursday afternoon.
Canadian diplomat Kevin Vickers, who famously shot the Ottowa gunman in 2014, tackled a protester during a military memorial ceremony.
The newsreader Sian Williams has revealed that she has had a double mastectomy after being diagnosed with breast cancer.