A Lincoln Pius X High School teacher was arrested during a prostitution sting over the weekend. 55-year old Stephen Lacher was in court Monday. He taught science at the school since 2005 and the school is currently investigating the arrest before taking action. Police say that Lacher offered an undercover female officer $100 for a sexual act or acts. Lacher was one of seven men arrested during the operation. Police say some of the men offered the undercover officer anywhere from $10 to $200 for sex and one suspect even offered money and an iPod.