The only witness to the murder of Stephen Lawrence has told Daybreak that young people in the UK are still carrying knives to protect themselves.
Duwayne Brooks appealed to the police to continue the investigation into Stephen's death so that his killers could be bought to justice.
Mr Brooks was Stephen's best friend and is now a Liberal Democrat Councillor in London.
A memorial service has been held to mark the 20th anniversary of the racist murder of Stephen Lawrence.
Twenty years after Stephen Lawrence's death, an exclusive poll reveals perceptions of attitudes towards race in the Metropolitan Police.