​Key facts: 

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• Banaz Mahmood, a 20-year-old from a strict Iraqi Kurdish family, moved to the UK as a child.

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• Forced into an abusive marriage at 17 to an older man, Banaz endured years of domestic violence and marital rape.

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• After escaping her husband, she fell in love with Rahmat Suleimani, whom her family did not approve of.

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• Banaz approached the police five times, reporting threats from her family.

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• Despite her repeated pleas and detailed warnings about the threat to her life, the police failed to take her seriously.

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• Her father, uncle, and cousins orchestrated the killing after Banaz's relationship with Rahmat was discovered.

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• Banaz was strangled and tortured by her cousins, with her father and uncle playing key roles in the plot.

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• The episode explores the systemic police failings and the eventual investigation led by DCI Caroline Goode, who made it her mission to secure justice for Banaz.

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• The episode highlights the recording of the suspects boasting about the murder and how Banaz’s disappearance was initially ignored by the family.

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• Banaz’s father and uncle received life sentences, while her cousins who fled to Iraq were eventually extradited and convicted after a lengthy legal process.