Arsema had returned from school when she was attacked
The mother of a schoolgirl stabbed to death by an obsessive ex-boyfriend has said police ignored his threats.
Arsema Dawit, 15, was stabbed more than 30 times in a lift at the flats where she lived in Waterloo, central London.
Defendant Thomas Nugusse, 22, could not be tried because he suffered brain damage in a suicide attempt in prison.
Arsema's mother Tsehaynesh Medhane said police ignored her warnings that Nugusse was a danger to her daughter. The police watchdog is investigating.
It would have been better if the murderer had taken all our lives not just Arsema's
Mrs Medhane said she awaited the outcome of an Independent Police Complaints Commission (IPCC) investigation and added: "I believe Arsema's life could have been saved if the police had taken action when I approached them."
She also said: "My body is alive but my spirit is dead and I feel with her death I died too.
"It would have been better if the murderer had taken all our lives not just Arsema's as we have not been able to live our lives since that terrible day."
IPCC commissioner Rachel Cerfontyne said: "IPCC investigators will now examine the circumstances surrounding the police contact with Arsema between 30 April and 2 June 2008.
Unfit to plead
"In particular we will look at how the police responded to an initial report made by Arsema at Kennington police station on 30 April of assault and threats to kill, and the subsequent investigation by officers from a neighbouring borough."
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