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BBC News follows the the UK's major criminal cases, focusing on the fight for justice, investigation process and experiences of those affected.
Sabina Nessa was killed at random by a man with a history of violence.
Sir David Amess MP was murdered by an IS fanatic, at a meeting in a church in Southend.
This is the story of a dangerous MI5 agent, which the government tried to keep secret. Contains some violent scenes.
Rikki Neave left for school but never came home. Decades on his killer has been jailed.
How a lorry driver, looking at dating sites while driving, went on to kill three. Contains upsetting scenes.
Leiland-James was taken from his mother at birth by social services. Then he was murdered. Contains some upsetting scenes.
The mum who stabbed to death a convicted paedophile after he abused her three sons.
Alistair Wilson was shot at his front door in 2004. Are police closing in on his killer?
Revealing the killer who decapitated her friend and dumped her body.
Steven Craig re-enacted a torture scene from the film Reservoir Dogs burning his partner.
Zara was killed walking back from a night out by a man labelled a "danger to any woman".
The schoolgirl charged with terrorism, but found to have been exploited. Contains upsetting scenes.
Could the Manchester Arena bombing have been stopped?
A gunman kills five people within minutes. Could the shootings have been prevented?
Nine year old Olivia Pratt-Korbel was killed when shots were fired into her family home.
Elle Edwards was shot dead as she celebrated at Christmas in a murder that shocked the UK.
Lilia Valutyte died from a single stab wound in her chest. Who killed the nine-year-old? Some upsetting scenes.
The story of a social media influencer, her mum and a murder plot.
The MP who rose from obscurity to being imprisoned for fraud. The story of Jared O'Mara. Contains some strong language.
Linda Razzell was murdered by her husband in 2002 - will he now reveal where her body is?
Kidnapped and murdered while on a gap year in France. Is it finally time for justice?
The hospital unit where patients were drugged to keep them 'quiet and compliant'.
Brianna Ghey was stabbed to death - two teenagers tried to get away with murder. Contains disturbing scenes.
Shakira Spencer was tortured and starved by people she considered friends. Contains some upsetting scenes.
The shocking story of how a teenage relationship ended in murder. Some upsetting scenes.
In the summer of 2023, the lives of three families changed forever. Contains upsetting scenes.
The true story of the Army’s killer agent inside the IRA. Contains upsetting scenes.
The story of footballer Cody Fisher who was stabbed to death in a nightclub in Birmingham. Contains scenes of moderate violence.
When a man is stabbed to death outside a nightclub, armed police search for his killer. Some upsetting scenes.
How a house party turned into a murder scene - the fatal stabbing of Mikey Roynon. Contains some upsetting scenes.
Six years after surviving a horror smash, Monika died. It was time for justice, again. Contains upsetting scenes.
When kids kill. The shocking story of two 12 year olds, a machete and a brutal murder.
The shocking story of Gisele Pelicot, raped by strangers her husband invited to abuse her. Contains upsetting scenes.
The shocking story of two innocent teenagers murdered in a case of mistaken identity.
Wendy Buckney knew about her neighbour's past but wanted to give him a second chance. Contains some upsetting scenes.