The second of two sisters, who went missing on November 6, has now been found, police said today.
Appeals had been made for help in finding 11-year-old Kathleen Doherty from Greenford who had gone missing with her 14-year-old sister Biddy.
Kathleen was found today and returned to the care of the local authority. Biddy had been found earlier this week.
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The victim, who was also 15, was stabbed repeatedly just yards from the Capital City Academy School in Willesden.
Crossrail contractors have been hit with a fine of more than a million pounds over the death of a worker and other incidents.
Anh Nhu Nguyen, 52, claimed he lived in the North Kensington block and that his wife and son had died in the fire.