CNN investigated Republican presidential candidate Ben Carson‘s claims that he violently attacked his classmates, and could find no corroborating evidence that the incidents occurred. Carson’s classmates seemed skeptical. “I don’t know nothing about that,” said one classmate of the stabbing incident. “It would have been all over the whole school.” “I personally do not have knowledge of those incidents,” said another former classmate said. “I wondered, ‘When did that happen?'” Indeed, everyone who knew Carson in childhood described him as exactly the mild-mannered man he grew up to become, not a hothead. “He got through his day trying not to be noticed,” one friend said. “I remember him having a pocket saver. He had thick glasses. He was skinny and unremarkable.”