A Rochester man who admitted to sexually abusing children is headed to prison.
John Knowlton, 40, was sentenced Thursday to 20 years in state prison followed by 20 years of parole. He also has to register as a sex offender.
Knowlton pleaded guilty back in June to first degree rape. Prosecutors say Knowlton abused three children over the course of several years.
Knowlton's plea means he can not appeal the sentence.