We start with a harrowing case of violence by a police officer towards a vulnerable teenage girl.

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Tonight this programme has spoken exclusively to one of her relatives - on condition of anonymity - who's seen video footage of the attack.

PC Benjamin Kemp was dismissed after hitting the 16-year-old more than 30 times with a baton, as well as spraying CS gas in her face.

Her family are calling for the CPS to reconsider its decision not to bring criminal charges against him.