Danny Castledine's family have raised thousands of pounds after he was stabbed to death.
Mrs Castledine said anyone could be a victim of knife crime.
CCTV seen by Danny's family shows the man pulling out a knife and Danny running away. He chased Danny, who was then stabbed multiple times.Danny's family do not know was the motive was, but suspect it might have been a robbery.
"We've got to be doing more to tackle people who are carrying these weapons, because if they are carrying them and they get into some problem, they're going to use them," said his mother.
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