CHICAGO (AP) - Staff at a suburban Chicago high school called 16-year-old Corey Walgren to the dean's office to ask about a video he made of himself having sex with a classmate. A few hours later, the teen walked to the top of a five-story parking deck and jumped.The suicide of the honor-roll student underscored a dilemma for schools when confronting students suspected of recording and sharing sexual images: Should school officials wait until parents arrive to pose questions and search cellphones for illicit photos or video?