A police officer has appeared before magistrates in Northampton.
Jason Farquhar, aged 43, is charged with three allegations of sexual assault, nine of misconduct in public office, one of intending to pervert the course of justice and one of unauthorised computer use.
The offences are said to have taken place between January 2013 and October 2016.
Farquhar entered not guilty pleas to all charges and the case was adjourned until August 9 at Northampton Crown Court.
Farquhar was released on unconditional bail.