Wiltshire Police have expressed their sympathy for the family of Sian O'Callaghan and praised their, "great dignity throughout the court process."
In a statement the police said:
"This was a complex and fast moving investigation and from the outset the priority of the Senior Investigating Officer Detective Superintendent Steve Fulcher was always to try and find Sian alive but unfortunately this was not possible.
"This was a violent and brutal murder of a young woman in the prime of her life. It is likely that Sian suffered horrifically from the point that she was abducted.
"Halliwell, in committing this crime, betrayed his position of trust as a taxi driver as he preyed on a lone vulnerable female.
"Today’s hearing was about bringing justice for Sian’s family. They have continued to display great courage and dignity and we hope this will provide them with some comfort at this most difficult time."