Halliwell sentenced to life imprisonment

48-year-old Christopher Halliwell has been sentenced to life imprisonment for the murder of Sian O'Callaghan.

The taxi driver pleaded guilty to the murder of the 22-year-old in March last year.

Robert Murphy looks back at the police investigation:

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Halliwell Sentenced To Life

Taxi driver Christopher Halliwell, 48, pleaded guilty at Bristol Crown Court to murdering nightclubber Sian O'Callaghan, who disappeared after a night out in Swindon in March last year. He has been jailed for life