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Its awful. but i want people to know he wasnt always like this. he was a completely different person growing up. he was the guy next door. >> reporter: again, that gunman is now dead. authorities very much investigating what prompted this shooting here that left four people dead and others injured. certainly four families and an entire community in fact, in some ways the entire country, grieving over this. >> thank you so much. dave wagner reporting on the ground from chattanooga. we appreciate ...