Episode 7: Fulcher couldn’t ignore a potential confession from a self-confessed killer. After Halliwell was taken to the police station, Fulcher was hailed a hero. In court though, if Fulcher had broken the rules, could Halliwell’s confessions be inadmissible? 

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Episode 6: Followed by a huge surveillance team, Halliwell led Fulcher to the location where he had taken Sian. He had killed her, he told Fulcher. Fulcher would have taken Halliwell in, but then the killer said: ‘Do you want another one?’

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Episode 5: Halliwell said: ‘Have you got a car? We’ll go.’ Instead of taking him to the police station with access to a lawyer, Fulcher agreed. Sian could still be alive. Fulcher used an exception to the rule for urgent interviews where a life is at stake. 

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Episode 4: Fulcher had to navigate the minefield of an active investigation and the intense media interest. The minute police saw Halliwell buy an overdose quantity of pills, the game was effectively over. Halliwell was arrested. 

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Episode 3: Halliwell had a police record and looked like a good suspect. Fulcher made the decision to place him under covert surveillance, hoping he still had Sian and he could lead them to her. Teams of police followed him for several days.

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Episode 2: The car stopped next to Sian, and a minute and four seconds later, it drove off and she was in it. But it didn’t make sense. Sian didn’t live that far away. More CCTV footage showed it was a taxi. The driver: Christopher John Halliwell.

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When 22 year old Sian O’Callaghan went missing, Detective Steve Fulcher arrested a suspect who offered to lead them to her body. The suspect then asked, ‘Do you want another one?’  What would you have done?

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Episode 7: When Kananook local, Steve, was a teenager, he tripped over a bag buried in mud that could hold a vital clue.

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Episode 6: Three years after Sarah went missing, the Frankston serial killer took the lives of three young women. Is there a connection to Sarah?

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Episode 5: Jodi Jones had killed before. In the days after Sarah MacDiarmid vanished, she began telling people she was responsible.

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