The police handling of the case of Banaz Mahmod in the months before she became the victim of an “honour” killing is to be scrutinised by the Independent Police Complaints Commission, it was announced.

Mahmod Mahmod was found guilty on June 11 of murdering his 20-year-old daughter after a trial at the Old Bailey. She was strangled and buried in a suitcase in a back garden.

Mahmod, 52, and his brother Ari Mahmod, 51, ordered the murder because they believed that Miss Mahmod had shamed the family. She allegedly told police four times before she disappeared that she feared for her life, and gave them a list of three men she thought would murder her.

An internal review of the case by Scotland Yard’s Directorate of Professional Standards has been handed over to the IPCC after strong public reaction to the case. Nicola Williams, an IPCC commissioner, said: “Ms Mahmod was a young woman who had her whole life in front of her. It is a tragedy that she has lost her life at the hands of members of her own family.

“Concerns have been expressed by members of the family and community about how the police dealt with Ms Mahmod. I will ensure that our investigation fully examines all contact between her and the Metropolitan Police Service to determine whether anything could or should have been handled differently.”

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