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“I have no idea,” he said, adding: “He’s very quiet and he doesn’t really talk to anyone.”

Frank Hall, an assistant high school football coach who has been hailed as a hero by students who say he chased the gunman out of the cafeteria, told a Cleveland TV station that he couldn’t discuss what happened, but added: “I wish I could have done more.”

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AP writers Dan Sewell in Cincinnati; Julie Carr Smyth, Andrew Welsh-Huggins and Ann Sanner in Columbus; and photographer Mark Duncan in Chardon contributed to this report.