A 33-year-old Naperville man who worked as a paraprofessional at a Naperville school has been charged with four counts of felony possession of child pornography after police investigated a tip from the National Center for Missing and Exploited Children.

Jeffrey Wickman, of the 25W200 block of Concord Road, was arrested on a warrant Nov. 18 after he turned himself in at the Naperville Police Department.

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