According to his grandparents:
Yang-Sun revealed the eight-year-old was diagnosed as autistic soon after his family emigrated to the US.She said: “He was very quiet and only followed his mother and father around and when others called his name he just answered yes or no but never showed any feelings or motions.
“We started to worry that he was autistic – that was the big concern of his mother. He was even a loner as a child.
“Soon after they got to America his mother was so worried about his inability to talk she took him to hospital and he was diagnosed as autistic.”
