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Doncaster teenager's killer starts a jail sentence

Hannah Bonser, a former psychiatric patient who stabbed to death a teenager to death, has been jailed. She is starting 22 years behind bars - after a jury decided she knew exactly what she was doing on Valentine's Day this year.

Bonser has still never said why she carried out the attack. Casey's family have spoken of their devastating loss. Chris Kiddey reports.

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