It took school and police officials just a few minutes to extinguish 16-year-old Corey Walgren's promising future. All they did was utter two words: child pornography. Corey, a junior at Naperville North High School in Naperville, Illinois, was a perfectly normal, social, good-looking 16-year-old. He was an honor roll student with dreams of attending a Big Ten college. He had typical interests for a teenager boy: hockey, fishing, and, yes, girls. Corey committed suicide in January, just hours after a school resource officer confronted him about an alleged illegal item on his cell phone—a recording of Corey having sex with...