Home Office pathologist Dr Amanda Jeffrey carried out a post mortem examination and found that Sian O'Callaghan had died from the combined effects of two stab wounds to the head and neck, as well as compression to the neck.
There was further evidence of blunt trauma to the back of the head and areas of external deep bruising to her face.
The trauma to Miss O'Callaghan's head could have been caused either by her falling, being pushed to the ground or by her head being forcibly struck by a broad object.
This resulted in a fracture to the skull and the bruising on her body was consistent with being punched or kicked.
There was also evidence of bruising to the neck, which could have been caused by either compression, blunt force trauma or a combination of both.
What is moral is not always legal. That's the hard and uncomfortable lesson of the investigation into the disappearance of Sian O'Callaghan.
Christopher Halliwell to serve 30 years for the murder of Sian O'Callaghan. But escapes justice over second murder after police blunder.