Editor Notes: Incident 886 may raise questions regarding its alignment with the "but-for" causation standard outlined in the AIID criteria. The "but-for" provision requires that an AI system play an important role in the chain of events leading to harm, such that the specific harm would not have occurred without the system's involvement. While the role of ChatGPT in this case appears to be secondary, its inclusion is notable as it represents one of the first prominent instances where generative AI is reportedly linked to planning a high-profile harmful event. Given the significance of this development in discussions about the potential misuse of AI, the incident has been indexed for further analysis.