Christopher Halliwell admits Sian O'Callaghan murder

A taxi driver has pleaded guilty to the murder of Sian O'Callaghan who went missing after visiting a nightclub in Swindon in March last year.

Christopher Halliwell, 48, of Ashbury Avenue, sexually assaulted the 22-year-old office worker and stabbed her in the head and neck.

Jon Kay reports from Bristol Crown Court.