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Police digging the dirt on the Lawrence family: would it happen now?

A former undercover officer says there was a secret operation to discredit Stephen Lawrence's family after they criticised how police handled the investigation into his murder.

In 1999 a major inquiry into the case found the police was institutionally racist - but details of a supposed smear campaign didn't come out at the time. The Met hasn't denied that it happened.

Would today's police try to damage victims of crime to protect their own reputation?

Are forces still racist? Or has policing changed in the 20 years since Stephen Lawrence's murder?

Nicky Campbell takes your calls.