Take a closer look at the May 2017 Ariana Grande concert at Manchester Arena which was interrupted by a devastating bombing The bombing remains one of the UKs deadliest terrorist incidents A suicide bomber detonated an improvised explosive device in the foyer of the Manchester Arena The attack resulted in 22 deaths and hundreds of injuries including many terrified children and young people

This is the tragic story of Ann Maguire who was stabbed to death by a teenage pupil Will Cornick while teaching a Spanish lesson at Corpus Christi Catholic College in Leeds in 2014 Investigations revealed that Cornick had expressed his desire to kill Maguire to other students via social media and in conversations before the attack Despite these many statements they were not taken seriously

Gemma McCluskie was murdered in March 2012 in London England She was a British actress known for her role in the BBC soap opera EastEnders Gemmas disappearance initially sparked a widespread search until her dismembered body was found in the Regents Canal in East London a few days later Her brother Tony McCluskie was later convicted of murdering and dismembering her following a dispute

In 2011 a string of mysterious deaths occurred at the Stepping Hill Hospital in Stockport Greater Manchester The nursing staff observed a concerning pattern of hypoglycemic attacks in patients with no prior history of diabetes Suspecting that the saline bags had been tampered with the hospital alerted the police Eventually nurse Victorino Chua was found guilty of poisoning these patients

Delve into the crimes of Steve Wright who was dubbed the Suffolk Strangler after murdering five women who worked as prostitutes in Ipswich between late October and early December 2006 Body after body was found floating in the rivers while police were left with few leads to go on After one of the most intensive murder investigations in the UK at that time Wright was arrested and found guilty

Take a revealing look at the gruesome crimes committed by the East London serial killer Stephen Port who drugged and murdered four young gay men in London between 2014 and 2015 Port administered fatal doses of the daterape drug GHB gammahydroxybutyric acid to his victims resulting in their deaths He was leaving evidence and clues all over the place but police failed to connect the dots