The mother of missing Sope Peters will be in Durham to help with the appeal to trace him. She has travelled from America to speak with police and journalists in the hope someone will come forward with information.
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The pair defrauded Durham County Council out of nearly £100,000 but were given suspended sentences.
Gascoigne is alleged to have sent abusive tweets, text messages and telephone calls to Amanda Thomas in March this year.
The Black Cats are attempting to find their seventh permanent boss since the Irishman's departure.