PITTSBURGH (AP) -- Police say a substitute teacher at a Pittsburgh-area high school took heroin before work and passed out in class. KDKA-TV reports that Bellevue Police Sgt. Mike Hudson says 26-year-old Christopher Chiappetta, of Pittsburgh, was arrested Wednesday after he passed out in front of 11 students. Authorities say they found four baggies of heroin in Chiappetta's pocket and marijuana in his car, and that he confessed to using heroin around 6 a.m. Wednesday. Chiappetta faces drug charges as well as an endangering children count. He's being held at the Allegheny County jail, unable to post $10,000 bond. No attorney is listed on court papers. A preliminary hearing is scheduled for later this month.