These are the first pictures of a 14-year-old boy who was knifed to death on a London bus as his mum hits out at gangs. Kelyan Bokassa was stabbed to death in front of horrified passengers of the 472 bus headed toward Abbey Wood just before 2:30pm on Tuesday. Fighting back tears, Kelyan’s mum Mary Bokassa, 50, said: “He was very kind and caring. He cares about people and had a good sense of humour. He was very polite. He was interested in football and was a supporter of Arsenal. “My son and