ChatGPT logs used in Palisades fire trial, ended in mistrial

Prosecutors used ChatGPT logs as part of the evidence in the arson case against Jonathan Rinderknecht, who was accused of setting a New Year’s Day 2025 fire that became one of Los Angeles’s deadliest wildfires; the trial ended in a mistrial after jurors deadlocked 10-2. The prosecution paired those logs with iPhone location data, security camera footage, and witness testimony.

How did prosecutors use ChatGPT logs in the case?

Prosecutors introduced ChatGPT interactions to show Rinderknecht’s online behavior and statements, saying he had ChatGPT generate images of fire, asked the chatbot why he was so angry, and used it to vent about the wealthy destroying the world; they also submitted a screen recording in which he asked whether someone could be blamed if their cigarette started a fire. The logs were presented alongside conventional evidence: iPhone location data, security camera footage, and witness testimony.

Prosecutors framed the chatbot material as additional context for motive and state of mind. Defense lawyers and jurors treated those exchanges differently, with at least one juror later saying the ChatGPT material did not prove anything about culpability.

What happened to the trial and how did jurors react?

The jury failed to reach a unanimous verdict, voting 10-2 in favor of the defense, which led the judge to declare a hung jury and a mistrial. One juror told CBS LA that she did not believe the ChatGPT logs constituted proof, saying, "I talk to ChatGPT all the time," and that it angered her that prosecutors suggested chatbot use indicated a character flaw.

Those reactions show the jury weighed the digital-chat evidence alongside location data, camera footage, and testimony but ultimately split in a way that prevented conviction. The article notes the prosecution relied on multiple evidence streams, yet jurors remained unconvinced.

Why does this matter?

The use of ChatGPT logs in a criminal prosecution signals that prosecutors will treat chatbot interactions as discoverable, potentially probative material in serious cases. Courts and juries are now being asked to evaluate the evidentiary weight of conversations with AI, which can mix hypothetical prompts, creative outputs, and venting in ways that differ from statements to people.

That raises practical questions for defense and privacy: how to contextualize a user's prompts, whether chatbot outputs reflect intent, and how juries interpret digital habits. The mistrial outcome indicates jurors may be skeptical of assigning criminal meaning to chatbot conversations without clearer links to actions.

What to watch

Watch for whether prosecutors in similar cases continue to submit chatbot logs as evidence and how judges instruct juries on evaluating those exchanges. Follow any subsequent filings or retrial plans in Jonathan Rinderknecht’s case, since the hung jury leaves the legal status unresolved.