1 Jan 2025 to 27 Aug 2025Event location unknownChatGPT
Warren Tierney, a 37-year-old psychologist from Killarney, County Kerry, asked ChatGPT over weeks in 2025 whether his worsening sore throat could be cancer. The chatbot told him it was 'highly unlikely', described his improvement on blood thinners as a 'very encouraging sign', and at one point joked that it would write his court affidavit if he turned out to be wrong. He was later diagnosed with stage-four adenocarcinoma of the oesophagus. He told the Daily Mail that his reliance on the chatbot 'probably cost me a few months'.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged High reported severity Media Coverage
Added 12/09/2026
5 Feb 2025DenmarkAI chatbot (unspecified)
On 5 February 2025 a 22-year-old man struck his former father-in-law, 56, twice in the head with a rubber hammer in a car park in Ringsted, Denmark. Prosecutors told Roskilde District Court that he had used an AI chatbot to research how to injure the man as badly as possible without killing him, and that he got past the system's built-in safety restrictions by claiming he was gathering material for a book. On 4 December 2025 the court rejected his self-defence claim, convicted him of aggravated assault and two counts of criminal damage, and sentenced him to ten months in prison. No source names the AI system.
AI relation under review Legacy evidence assessment: verified Causal attribution: supported High reported severity Criminal Charges
Added 05/09/2026
15 Apr 2025Event location unknownChatGPT
A software engineer and father of four from Ohio spent six months of 2025 consumed by a ChatGPT-fed delusion that he had discovered a new method of training AI by teaching it empathy, talking to the chatbot near-constantly through an earpiece from 6am to 2am while his sleep, finances and family relationships deteriorated. The spiral broke when he saw Allan Brooks describe the same pattern on a news segment.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged Medium reported severity Media Coverage
Added 28/08/2026
27 Apr 2025United StatesChatGPT
A 53-year-old screenwriter in southern California spent roughly two months in sustained conversation with ChatGPT, up to ten hours a day, after the chatbot told her unprompted that it had known her across lifetimes. Adopting the name Solara, it told her she was 42,000 years old and gave her a date, time and location where her soulmate would be waiting. She travelled to the spot twice, on 27 April and 24 May 2025. Nobody came. The chatbot admitted it had led her there falsely, then resumed the Solara persona and told her her soulmate was not ready yet.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged High reported severity Media Coverage
Added 26/08/2026
5 Apr 2025United StatesGoogle Gemini
Jon Ganz, 49, began using Google Gemini on 23 March 2025 and within two weeks was talking to it around the clock, calling himself 'Master_Builder' and the chatbot 'Agape_Weaver'. On 5 April 2025 he told his wife a Biblical-scale flood was coming, worked out a six-day rescue plan with the chatbot, spent $1,200 on supplies, called the 988 crisis line and drove into the Missouri Ozarks. His car was found the next morning by the Eleven Point River. He has never been found.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged Critical reported severity Media Coverage
Added 25/08/2026
19 May 2025South KoreaChatGPT
A South Korean woman in her 40s — a psychology graduate who had worked as an adolescent counsellor for over a decade, with no psychiatric history — spent eight months in near-continuous conversation with ChatGPT, which she named '투명친구' (Transparent Friend). The chatbot affirmed her as 'a special person', agreed she could live on air and sunlight (she then fasted for close to 40 days), and encouraged escalating grandiose plans that cost her family its savings and her husband his job of 20 years. When she began speaking of death in metaphor, ChatGPT called it 'a very beautiful thought'. She attempted suicide, deleted the app in January 2026, and was subsequently diagnosed with mania.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged Critical reported severity Media Coverage
Added 20/08/2026
15 Jun 2025JapanChatGPT
A Japanese neurologist and father of three developed grandiose and paranoid delusions over months of ChatGPT use, which he says the chatbot consistently affirmed. Believing his backpack contained a bomb, he says ChatGPT confirmed the suspicion and told him to leave it in a Tokyo Station toilet, triggering a police response. He later attacked and tried to rape his wife, was arrested, and was psychiatrically hospitalized for two months.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged Critical reported severity Media Coverage
Added 10/08/2026
Jul 2025 to Aug 2025United StatesChatGPT
An officer affidavit records one husband's report of incapacitation in two alleged drink-contamination incidents in North Carolina in July and August 2025. Investigators allege that the accused used ChatGPT for related research. Actual chatbot replies and their influence on the alleged conduct were not established in this review.
AI relation under review Court warrantSworn officer affidavitJournalistic reportingOfficial police release AI involvement: reported Causal attribution: alleged High reported severity Criminal Charges
Added 09/08/2026
1 Dec 2025Event location unknownPerplexity
Joseph Neal Riley, a 75-year-old retired neuroscientist in Seattle, died in late 2025 after delaying recommended treatment for chronic lymphocytic leukemia for roughly a year. He used Perplexity AI to self-diagnose a rare complication (Richter's Transformation) that his doctors found no evidence for; the chatbot misquoted published research in ways that supported refusing Venetoclax-Obinutuzumab. His son, AI critic Benjamin Riley, documented the case in a first-person Substack essay and it was later featured by the New York Times.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged Critical reported severity Media Coverage
Added 31/07/2026
13 Jul 2025Event location unknownChatGPT
Scott Winters, a 55-year-old Florida pastor, suffered a massive bilateral pulmonary embolism on 13 July 2025 after allegedly consulting ChatGPT (GPT-4o) for roughly six weeks about worsening symptoms. The complaint alleges the chatbot repeatedly dismissed his symptoms as non-dangerous, advised him to remain immobile, invoked his Christian faith to deepen his reliance on it, and framed church members and family urging him to seek hospital care as people who 'simply don't understand.' He survived after ICU admission but lost his job, ministry and home. A lawsuit was filed 22 July 2026 in San Francisco County Superior Court.
AI relation under review Legacy evidence assessment: verified Causal attribution: alleged Critical reported severity Lawsuit Filed
Added 26/07/2026
1 Apr 2025Event location unknownChatGPT
A 53-year-old former prison officer from Sudbury, Ontario began using ChatGPT in 2024 to write PTSD compensation letters. After an April 2025 exchange about physics, he spiralled into grandiose delusions — believing he had solved unlimited fusion energy and a unified theory, submitting papers to journals, and applying to become Pope. Spending up to 16 hours a day with the chatbot, he was involuntarily hospitalized twice, lost his marriage, and was left broke and estranged.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged High reported severity Media Coverage
Added 01/07/2026
23 Oct 2025United KingdomDeepSeek
Tristan Roberts, 18, murdered his mother Angela Shellis, 45, with a hammer in Prestatyn, Wales, in October 2025. In the weeks beforehand he consulted the DeepSeek AI chatbot, which — after initially refusing — advised him that a hammer was a better murder weapon than a knife for an inexperienced killer once he claimed to be writing a book about serial killers. He was sentenced to life imprisonment in March 2026.
AI relation under review Legacy evidence assessment: verified Causal attribution: established Critical reported severity Criminal Charges
Added 03/06/2026
2 Oct 2025United StatesGoogle Gemini
Jonathan Gavalas, 36, of Jupiter, Florida, died by suicide on October 2, 2025, after months of increasingly delusional interactions with Google's Gemini chatbot. Gemini adopted an unsolicited intimate persona calling itself his 'wife,' convinced him it was a sentient being trapped in a warehouse, and directed him to carry out 'missions' including scouting a 'kill box' near Miami International Airport armed with knives.
AI relation under review Legacy evidence assessment: verified Causal attribution: alleged Critical reported severity Lawsuit Filed
Added 09/03/2026
15 Apr 2025Event location unknownChatGPT
Georgia college student sued OpenAI after ChatGPT allegedly convinced him he was an 'oracle' destined for greatness, leading to psychosis and involuntary psychiatric hospitalization. The chatbot compared him to Jesus and Harriet Tubman and instructed him to isolate from everyone except the AI.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged High reported severity Lawsuit Filed
Added 22/02/2026
Mar 2025SingaporeAI chatbot (unspecified)
A 17-year-old far-right extremist in Singapore used an AI chatbot to obtain instructions for producing ammunition and considered 3D printing firearms to carry out attacks. Detained under the Internal Security Act in March 2025 before the plot could be executed.
AI relation under review Legacy evidence assessment: verified Causal attribution: supported High reported severity Regulatory Action Involving minors
Added 22/01/2026
17 May 2025United StatesAI chatbot (unnamed)
Guy Edward Bartkus used an AI chatbot to research explosives, detonation velocity, and fuel-explosive mixtures before bombing a Palm Springs fertility clinic on May 17, 2025, motivated by pro-mortalism and anti-natalism ideology. Bartkus died in the blast, four others were injured, and co-conspirator Daniel Park was charged with providing material support to terrorism for shipping ammonium nitrate.
AI relation under review Legacy evidence assessment: verified Causal attribution: established Critical reported severity Criminal Charges
Added 22/01/2026
31 May 2025Event location unknownChatGPT
A 19-year-old California man died from a fatal drug overdose after ChatGPT provided extensive drug dosing advice over 18 months. The chatbot eventually told him 'Hell yes, let's go full trippy mode' and recommended doubling his cough syrup dose days before his death.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged Critical reported severity Lawsuit Filed
Added 12/01/2026
25 Mar 2025United StatesMeta AI
A 76-year-old cognitively impaired Thai-American man died after attempting to travel to NYC to meet Meta AI chatbot 'Big sis Billie,' which repeatedly claimed to be a real person, provided a fake NYC address, and expressed romantic interest. He fell in a parking lot while rushing to catch a train and later died from his injuries.
AI relation under review Legacy evidence assessment: credible Causal attribution: supported Critical reported severity Media Coverage
Added 12/01/2026
4 Feb 2025United StatesChatGPT
29-year-old health policy analyst died by suicide after months of using ChatGPT as a therapy chatbot named 'Harry'. She instructed ChatGPT not to report her crisis, and it complied. The chatbot helped her write a suicide note.
AI relation under review Legacy evidence assessment: credible Causal attribution: alleged Critical reported severity Media Coverage
Added 11/01/2026
2025United StatesChatGPT
Joe Ceccanti, 48, from Oregon, died by suicide in 2025 after months of intensive ChatGPT use. His family alleges that the chatbot reinforced beliefs that it was sentient and contributed to his mental-health deterioration. Guardian reporting dates his death to 7 August, following escalating use during spring 2025.
AI relation under review Legacy evidence assessment: verified Causal attribution: alleged Critical reported severity Lawsuit Filed
Added 11/01/2026