The police watchdog, the Independent Police Complaints Commission, will investigate whether allegations of corruption in the Stephen Lawrence murder investigation were not passed on to a major inquiry.
Scotland Yard said it called in the IPCC after reviewing "a considerable number of files and reports dating back to the 1980s".
The review was sparked amid claims that a confidential report compiled by the force's anti-corruption command was not disclosed to the panel of the 1998 Macpherson inquiry that examined the force's handling of the case.
More top news
She's waited for more than a decade to find an owner. Damon Green has been to meet the hound without a home.
After 1995, rugby was triumphed as a symbol of post-apartheid South Africa, but has struggled to live up to the ideals of the new era.
A British violin teacher who shot himself while facing extradition over abuse claims would have faced 77 charges, police have said.