Theresa May: Lawrence family's 'unspeakable tragedy'
24 June 2013 Last updated at 17:46 BST
Reports the police wanted to smear the family of murdered teenager Stephen Lawrence are to be examined by a senior barrister, the home secretary has said.
Mark Ellison QC is already looking into allegations of police corruption in the initial investigation of the murder.
Undercover officer Peter Francis says he was instructed in 1993 to find information that could discredit the family and anti-racism campaigners.
May said the Lawrence family "experienced an unspeakable tragedy".