The 34-year-old principal of a local middle school collapsed and died Saturday during a game of flag football. Roger Slagle, principal of Sellman Middle School in Madeira, died from an undiagnosed heart problem, WLWT Eyewitness News 5 reported. Slagle worked in the district for nine years. He is survived by his wife and two daughters, ages 5 and 7. Slagle's wife is expecting the couple's third child in April, WLWT reported. Students at Sellman spent Sunday writing farewell messages and leaving flowers on the school's steps. "Everybody was crying because he was always there for us," student Christy Spink said....