PROVIDENCE, R.I. (WLNE) — A teacher at Nathanael Greene Middle School charged with possession of child sexual abuse material will be arraigned today. 50-year-old Joseph Gannon was arrested and charged with first degree sexual assault and one count of producing/transferring child pornography on Friday. According to the district website Gannon was an 8th grade science teacher. The district sent a letter to families of students at the school that said Gannon was placed on administrative leave and a suspected child abuse or neglect report was filed with the Department of Children, Youth, and Families. Categories: News