The mother of Stephen Lawrence told ITV Daybreak that since the Macpherson Report came out, that the Government is "moving backwards" over the 'stop and search' policy.
Her son was stabbed twenty years ago in South-East London.
The murder and police investigation become the subject of a wide ranging inquiry into policing with the Macpherson Report.
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Armed police were out in force as runners competed in the largest public event in the city since Monday's terror attack.
Taliesin Myrddin Namkai Meche, 23, was stabbed along with Rick Best, 53, when they tried to stop a racist attack on two Muslim girls.
The shadow home secretary, 63, said she worked in the Home Office for nearly three years when she was a trainee.