Boy, 17, who stabbed his older sister to death pleads guilty to her murder

Mali Bennett-Smith jailed for 10 years and five months after admitting he killed Luka, 19, because she was annoying'

A 17-year-old boy who stabbed his older sister to death after telling her he wanted to practise a headlock on her has pleaded guilty to her murder.

Mali Bennett-Smith, said his sister, 19-year-old Luka Bennett-Smith, had been annoying" and he wanted to kill her.