When dangerous offenders are released and later kill, the response follows the same script every time. Officials announce an inquiry. NHS trusts apologize. Politicians promise reforms. Internal reviews identify “communication failures” and “missed opportunities.” Then the institutions responsible continue operating exactly as before.
No senior official resigns. No sentencing body is dismantled. No tribunal member faces scrutiny. No one is held personally responsible for decisions that end in death.
The system protects itself first.
The pattern stretches back decades.
A Historic Pattern of Failure
In the early 1970s, Graham Young, later known as the “Teacup Poisoner”, was released from Broadmoor psychiatric hospital despite a horrifying history of poisoning offences. He subsequently murdered two co-workers with thallium. The case shocked Britain and should have served as a lesson in the dangers of premature release.
Instead, it became the first chapter in a recurring national failure.
Half a century later, Britain is still repeating the same mistakes.
Valdo Calocane, a Guinean-Portuguese dual national who killed three people in Nottingham in 2023, had repeatedly disengaged from mental health treatment before the attacks. Investigations later revealed multiple failures to monitor his deterioration and to enforce compliance with treatment. Despite being diagnosed with paranoid schizophrenia in 2020 and sectioned four times between 2020 and 2022, he was discharged from mental health services in September 2022. A few months later he murdered Barnaby Webber, Grace O'Malley-Kumar and Ian Coates. He also tried to murder a further three people before he was apprehended by the police.
In Wales, a schizophrenic patient, David Fleet, killed retired butcher Lewis Stone shortly after his release from a secure psychiatric facility. In Manchester, Joshua Carroll repeatedly escaped from psychiatric detention before later committing murder. In London, Abdul Khan was reportedly discharged just before killing his neighbor with a sword.
Every inquiry uncovers the same catalogue of failures. Understaffing, poor information sharing, missed warning signs, fragmented oversight and a chronic underestimation of risk.
Yet remarkably little changes because Britain’s sentencing culture prioritizes institutional ideology over public protection.
The Sentencing Council’s own guidelines place enormous emphasis on mental disorder as a mitigating factor in sentencing and culpability. Courts are encouraged to consider therapeutic outcomes, rehabilitation prospects and diversion away from prison.
In theory, this sounds compassionate and enlightened. In practice, the system has created powerful incentives to minimize dangerousness and maximize opportunities for release. That carries risks for members of the public, sometimes with deadly consequences.
Officials face professional criticism for appearing insufficiently sensitive to offenders’ mental health. They incur comparatively little career risk when release decisions go catastrophically wrong. The institutional culture, therefore, drifts steadily toward leniency. Caution toward detention becomes viewed as regressive, and public safety becomes only one factor among many, rather than the overriding priority.
None of this means mental illness should automatically lead to indefinite detention. Most mentally ill people are not violent and many offenders can safely return to society. But the state’s first responsibility is not to validate progressive sentencing theory. It is to protect innocent people.
The most revealing aspect of these cases is not simply that mistakes occurred. Human systems will always make mistakes. The real scandal is that the same categories of failure recur decade after decade without structural accountability.
The Case Study of Valdo Colocane
Take the case of Calocane. Despite being sectioned four times and knowing that he was not taking his medicine at home, he was still able to refuse injectable antipsychotic medication because he said he did not like needles. Instead of forcing him or volunteering this information after the killings, the NHS tried to hide these details. Although they commissioned an independent review of the care they offered, they initially claimed that they could not release it, citing data protection concerns. It was only after pressure from the victim's families that they released the full document.
The report revealed multiple other failures. A risk assessment in early 2022 told staff not to visit Calocane at home, or at least not to go alone, due to his history of violence. Despite this, when he missed multiple appointments later that year, he was discharged from mental health services. Staff who tried to visit him at home afterwards found he could not be located because he had provided an incorrect address. No further effort was made to treat him, leaving him free to kill a few months later.
The mental health nurse, Busayo Ajewole, who was looking after Calocane, had to admit to the inquiry that her notes were missing information, sometimes copied and pasted, and other times incorrect. Even though he twice tried to break into the flats of neighbors, in one case scaring one so badly that she jumped out of the window of her flat and fractured her spine, Ajewole's notes said he had no past history of violence and aggression.
Another entry in her notes claimed that Calocane was a "very polite and gentle, personable young man". Shortly afterwards, he assaulted a police officer who was assisting with a mental health assessment, requiring him to be tasered and restrained by multiple police officers. Ajewole was told about this assault but failed to include it in her risk assessment, instead writing that there had been no further violent incidents.
Similarly, Calocane's inpatient consultant, Dr Faizal Seedat, was shown text messages between Calocane and his brother in which he expressed violent thoughts, but did not show them to any other mental health workers or agencies.
The Public Is Left to Defend Itself
Human systems inevitably make mistakes. The deeper problem is that similar failures keep recurring, decade after decade, despite repeated inquiries and recommendations.
Each new case produces another review, another promise of reform and another public debate about whether lessons have truly been learned.
For many members of the public, confidence in the system increasingly depends not only on whether dangerous offenders are properly monitored, but also on whether institutions face meaningful consequences when catastrophic failures occur.
If psychiatric authorities and sentencing bodies possess the power to release dangerous offenders, critics argue they must also operate under far greater transparency and scrutiny when those decisions go wrong.
Without stronger accountability, Britain risks repeating the same cycle: release, tragedy, inquiry and apology.
