Sharon's case should be extraordinary but it isn't. A few miles away from Sharon another mother was left to solve her own daughter's murder
The number one suspect is interrogated by police until he confesses but it's not until 30 years later that the right man is put on trial.
Rumours choke the case and a vulnerable suspect is arrested. The first 48 hours after a crime are crucial: what did the police get so wrong in the days after Nikki went missing?
In 1992 on a council estate in Sunderland a seven year old girl is murdered. It took the police 30 years to find the killer, a convicted child sex offender who lived three doors away from where Nikki Allan went missing.
A murder, a mother and a thirty year investigation
In the final episode, Ceri travels to meet Rob in a peaceful garden in rural Wiltshire. What unfolds is a heated exchange about what Rob's story really is and what adds up to the whole truth.
When Global Witness out Rob in 2015, things quickly fall apart. He loses everything that matters to him but to this day he believes that if his voice had been heard, it would have all worked out differently.
Rob is adamant that in all the years he was undercover, he never sent information back to his spymasters that harmed the campaigners. But when you're the only one in control of the decisions, can you always get it right?
Rob Moore says he can justify going undercover among anti-asbestos campaigners because he was following a Buddhist principle, turning poison into medicine. But does his story really stand up to scrutiny?
It’s 2012 and Rob Moore goes 'into the dirt', undercover, to infiltrate a group of campaigners fighting for a ban on deadly asbestos. None of them knew they had a private spy in the camp. But it's hard to stay hidden forever.
Three years ago a former private spy came to Tortoise. He told an incredible story about infiltrating a campaign group, deceiving people for years but all the while being a 'double agent', before his world fell apart.
A private spy in a deadly world
Polly returns to investigate the murky world of private trans healthcare
Polly investigates why NHS England accelerated the closure of GIDS.
The public debate around the work of the Tavistock is getting louder.
GIDS desperately tries to hold its team together as the numbers on the waiting list tick up and up.
The profile of the young people seeking treatment starts to change
The decision is made to start offering puberty blockers to under-16s.
In the summer of 2022 the NHS announced it was winding up the Gender Identity Development Service for children and young people at the Tavistock. Critics of the service celebrated, its supporters were left in despair.
What happened inside the Gender Identity Development Service for children and young people at the Tavistock