A Quincy man already in jail on child pornography charges pleaded guilty to additional charges Thursday.
Gregory Korschot pleaded guilty to charges of aggravate criminal sexual abuse of a minor and predatory criminal sexual assault.
A judge originally sentenced Korschot in October 2012 to 11 years in state prison.
The new charges stemmed from an ongoing investigation.
Sentencing is scheduled for May 20 on the more recent charges.