A middle school substitute teacher has been charged with posing as a woman online to get an underage girl to send him nude photos. 26-year-old Jonathan Brecht of Franklin Park is charged with one count of possessing child pornography. He’s a 7th grade math teacher in the Seneca Valley School District. Officials there did not comment immediately after his arrest was reported Friday. Police say Brecht acknowledged posing as a woman on the dating app Skout, where he suggested having sex with the girl. According to the police, Brecht says he’s never touched a child and he has no desire to do so and that he was willing to take a lie-detector test to prove it. Defense attorney David Shrager says Brecht has no criminal history and is a “respected member of the community.”