Pros: Halliwell was minicab driver. He stopped her as she left night club. He took her to Savernake Forest where he stabbed her.
Halliwell had clocked off his shift. & turned off his cab tracking device. CCTV shows him cruising streets 'in circular movements...'
... Before abducting Sian. He makes 4 or 5 passes. CCTV shows him passing Sian, turn around and stop. Glare of headlamps distorts image
Chris Halliwell's daughter has appeared on ITV's Daybreak asking her father to give "justice" to the family of the second woman he killed.
Swindon taxi driver Chris Halliwell has been jailed for the murder of Sian O'Callaghan but is he guilty of the murder of other women?
It was a fluke, in a way, that Halliwell was ever caught. But it also needed some good detective work.