Alexandra Morgan, 34, was last seen on November 14,
filling up her Mini Cooper at a petrol station in Sissinghurst, near Cranbrook, Kent.
Her case was taken very seriously from the start, as it was ‘completely out of character for her not to contact her two children’.
Investigators arrested a 40-year-old man, from St Leonards-on-Sea, today.
Detective Chief Inspector Neil Kimber said: ‘We are now treating this case as a potential murder.
‘While we continue our investigation, I would urge anyone who may have seen Alexandra or her white Mini Cooper with a black roof to contact us.
‘If you think you may have seen Alexandra or something suspicious but are not sure, please do not hesitate to call and let us know.’