Twisted Christopher Halliwell ‘could have raped and killed dozens more women’ as cops look into trophy store

TWISTED Christopher Halliwell could be one of Britain’s worst serial ­killers, says the detective who put him behind bars.

Halliwell is serving life for killing Sian O’Callaghan, 22, and Becky ­Godden, 20.

But a secret trophy store of 60 items of women’s clothing suggests dozens more victims may have been raped or killed by him.

Only two of the items have ever been identified – a cardigan worn by Becky, who disappeared in Swindon in 2003.

And a high-heeled boot Sian was wearing before she was abducted on her way home from a nightclub in 2011.

Former cop Steve Fulcher says: “Are you seriously telling me that on two occasions he brutally murdered two women – and then there’s nothing before or since?”

In an explosive new book, Catching A Serial Killer, Steve tells the inside story of the case – and how his quest for justice cost him his job.

POLICE unearthed the stash of “trophies” just 15 miles from where serial killer Christopher Halliwell had led them to Sian O’Callaghan’s body.

Five days after her disappearance and desperate to find Sian alive, police had closed in on suspect Halliwell.

Having guided them to the remote spot where he had dumped her body, Halliwell had suddenly confessed: “I’m a sick f***er. I need help. Do you want another one?”

The fiend then revealed where cops could find the body of Becky Godden — who police did not even know was missing at the time.

Catching a double killer led to Detective Superintendent Steve Fulcher being hailed a hero by the families and twice nominated for a Queen’s Police Medal.

But his decision to break police guidelines and drive Halliwell to where he thought Sian might be found alive, instead of taking him to the police station for a formal interview, was to cost him his job.

When Halliwell’s confession about the ­location of Becky’s body was ruled inadmissible in court, other officers continued the hunt for more ­evidence — and unearthed the ­trophy stash in 2014.

In his book, Steve says: “At the bottom of a pond that was 8ft deep they found Sian O’Callaghan’s distinctive boot.

“Yet that wasn’t all. Halliwell had been busy. Buried around the pond were more items of women’s ­clothing. I wondered, did they belong to the six other victims I suspected Halliwell of killing? But I had my maths wrong.