The detective investigating the case of alleged sex predator Darren Purchase was accused in court of being biased.
The allegation was made against DC Julie Williams by defence counsel Jason Aris when he queried steps taken during the inquiry.
Cross-examining her in the witness box, he questioned her interviews with the defendant. But she immediately denied his suggestion that she had been biased.
Purchase, a 44-year-old father-of-four, of Hayfield Close, St John's, Worcester, pleads not guilty at Worcester Crown Court to a total of 22 sex charges including rape, buggery and indecent assault between 1984 and 2011.
After hearing details of three interviews given by Purchase to the police, Mr Aris suggested that his client was not given every opportunity to answer questions. But DC Williams replied that he answered each and every question although she was not sure he was being truthful.
The defence case begins tomorrow.