Peter Cadwallader, prosecuting, told the jury Mr Brewer acted improperly towards the two other female pupils, years after the alleged victim left the school.
And the CPS also said prosecutor Peter Cadwallader was selected for his skill in handling sensitive cases, adding that it had applied for special measures to shield Mrs Andrade in court.
During the trial, Peter Cadwallader, prosecuting, said Mr Brewer had also acted in an improper way towards two other female pupils - years after the alleged victim in the case left the school.