Christopher Halliwell was given a whole life sentence after he was convicted of the murders of Sian O’Callaghan and Rebecca Godden – but experts believe he could be responsible for more deaths
Twisted killer Christopher Halliwell targeted young women, brutally murdered them and then buried their bodies in shallow graves.
His victims, Sian O’Callaghan and Rebecca Godden, were in the prime of their lives when Halliwell murdered them.
If it hadn’t been for the dogged actions of one police officer, Becky’s remains may never have been found and her killer could have escaped justice for her death.
Sian had been on a night out with friends on March 19, 2011, when she vanished as she made her way home.
It was a journey – from nightclub to the home she shared with her boyfriend – that should have taken just 15 minutes.
But after leaving Suju in Swindon, Sian was captured on CCTV one final time before she disappeared.
Her boyfriend, Kevin Reape, raised the alarm at 9.45am the following morning when Sian hadn’t turned up at home.
He had messaged his girlfriend at 3.24am, just over half an hour after she left the club, and mobile phone records revealed Sian’s phone ahd received this message in Savernake Forest.
But at 12 miles from the club the only way Sian could have made it there was by car.
A huge search was launched, involving the police and members of the public, but was stood down four days later when officers said they were following “significant lines of inquiry”.
To the public, police released CCTV images of a green Toyota Avensis, but Det Supt Steve Fulcher believed he knew who the criminal was.
He pinpointed Halliwell as the prime suspect and put the taxi driver under constant police surveillance.
But is was Halliwell himself that forced police to make an arrest.
When he was spotted buying large quantities of pills, police feared he was about to commit suicide, and they swooped in to charge him with Sian’s kidnap and his green Toyota was seized.
In the following seconds, Det Supt Fulcher made a decision that would ultimately solve not only this case but that of murdered Becky – and ended the police officer’s own career.
Instead of cautioning Halliwell for a third time and taking him straight to a police station, Det Supt Fulcher tried something completely different that wasn’t in the rule book.