Nigel Pettitt, 54, was found guilty at Derby Crown Court on Tuesday, January 11 of 11 counts, including sexual assault and two counts of rape.
A Derbyshire police spokesperson said the crimes happened ‘over several years in the Chesterfield area’.
Pettitt, formerly of Holmeport Mews, in Chesterfield, had denied the offences but was found guilty following a trial.
The force spokesperson added: “He was remanded into custody and will be sentenced at Birmingham Crown Court in March.”
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