When 16-year-old
Becky Watts went missing in 2015, it sparked a major police investigation to find the teenager. But only two people knew where she was - her stepbrother Nathan and his girlfriend Shauna. Here,
Susanna Reid gains unprecedented access to police interview room footage to reveal the strategy and skill involved in catching
Becky's killers. There is also first-person testimony from some of the officers, and Susanna talks to
Becky's family about the impact of this appalling crime
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