After almost 20 years of tireless campaigning Doreen Lawrence finally saw two of her son's killers convicted in January 2012.
Her other son Stuart recently lodged a formal complaint with London's Metropolitan police after claiming he was stopped and searched by police because he was black.
The Metropolitan police is investigating the complaint under the supervision of the Independent Police Complaints Commission.
Doreen Lawrence told HARDtalk's Stephen Sackur that she has received threats and now that Stuart Lawrence has "made a stand" he also has been threatened.
You can watch the full interview on the BBC News Channel at 0430 on Tuesday 22 January and 0030 on Wednesday 23 January.
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