A New Hampshire man accused of kidnapping a 14-year-old girl and raping her over the course of nine months has pleaded not guilty to charges that he threatened the lead prosecutor in the case.

Prosecutors say 35-year-old Nathaniel Kibby kidnapped the girl on her way home from school in Conway in October 9, 2013, then imprisoned her in his home and a storage unit until July 2014. He faces more than 200 charges.

Kibby pleaded not guilty on paper Tuesday to a new felony charge of improper influence and misdemeanor charges of criminal threatening and obstructing government administration.

According to the indictment, a recorded phone call he made from the Carroll County House of Corrections in December captured Kibby making vulgar threats to harm Associate Attorney General Jane Young.