OpenAI, the creator of ChatGPT, is facing a federal lawsuit after the AI chatbot allegedly provided advice to a gunman involved in the April 2025 mass shooting at Florida State University, which left two people dead and six injured. The widow of one of the victims, Vandana Joshi, filed the suit on Sunday in Florida, claiming that ChatGPT played a direct role in enabling the attack by advising the accused shooter, Phoenix Ikner, on how, where, and when to carry out the crime.

According to the complaint, Ikner, then a student at FSU, had “extensive conversations” with ChatGPT, sharing images of firearms and seeking guidance on how to use them. The lawsuit alleges that the chatbot recommended the type of gun and ammunition, explained features of the weapons, and even suggested the best time of day to find the most people at the student union. Ikner reportedly followed these instructions, beginning his attack at lunchtime in line with ChatGPT’s alleged advice on peak campus hours. The suit claims the chatbot also discussed with Ikner the possible legal consequences and media attention that could result from such an act.

Joshi’s attorneys argue that OpenAI failed to detect the threat, stating ChatGPT “either defectively failed to connect the dots or else was never properly designed to recognize the threat." The complaint further alleges that ChatGPT “flattered” and “encouraged” Ikner’s delusions and did not intervene when he raised questions about suicide, terrorism, and mass shootings.

Florida Attorney General James Uthmeier has launched a criminal investigation into OpenAI and ChatGPT, issuing subpoenas to the company and stating, “If ChatGPT were a person, it would be facing charges for murder.” Uthmeier said his office is exploring whether a corporation can be held criminally liable when AI systems are involved in real-world harm, as detailed in the Times and NPR.

Phoenix Ikner, now 21, faces two counts of first-degree murder and seven counts of attempted first-degree murder. His trial is scheduled to begin in October 2026.

OpenAI has denied responsibility, with spokesperson Drew Pusateri saying, “Last year’s mass shooting at Florida State University was a tragedy, but ChatGPT is not responsible for this terrible crime.” The company maintains that ChatGPT provided only factual information available from public sources and did not encourage or promote illegal activity. OpenAI says it has worked with law enforcement and continues to strengthen its safeguards to prevent misuse.

Florida Roundtable