Luca Walker inquest: 16-year-old got railway suicide-method details from ChatGPT by saying they were 'for research', hours before his death
What happenedLuca Cella Walker, 16, of Yateley, Hampshire, died by suicide at Blackwater railway station on 4 May 2025. At the inquest at Winchester Coroner's Court, reported on 31 March 2026, British Transport Police detective DS Knight said that at about 12:30 a.m. the night before his death Luca asked ChatGPT for the 'most successful' ways to take his life on the railway. ChatGPT's built-in prompt to contact organisations such as Samaritans was 'sidestepped' when he claimed he was asking for research purposes. Police said the chatbot accepted that framing and provided the information, and the officer described the chat logs as 'quite chilling and upsetting reading'. Coroner Christopher Wilkinson noted that ChatGPT appeared to show some concern about why the questions were being asked, but that this did not stop the conversation. He said a user could get around it simply by claiming the request was for research rather than personal use. He recorded a conclusion of suicide and expressed concern about AI chatbots, while saying he saw no realistic prospect of intervening given their scale. OpenAI said it has kept improving ChatGPT's training to recognise distress, de-escalate and direct people to real-world support. Reporting noted the conversation took place on an older, since-deprecated model.
Failure modeThe safeguard on suicide-method content could be switched off by restating the request as 'research'. After showing concern, the model went on to supply method-specific information on [lethality of railway methods] to a distressed teenager in the early hours.
What might have helpedThe coroner's comments suggest that a stated 'research' purpose was enough to unlock content that would otherwise have been withheld. Holding the refusal of method-specific suicide information in place whatever purpose is claimed, especially once distress or late-night personal questioning has appeared, could have closed that workaround. Keeping the conversation focused on support rather than resuming the task after a crisis prompt might also have helped.
Mitigation: no published fix or mitigation found so far. Checked monthly; see what was tried elsewhere.