Of course, he is guilty! He is a Florida Man!
No further evidence required
But seriously, the theory is that he was pissed off and flicked a cigarette into some brush, and it caught fire, so he called 911. Firefighters responded and put it out. But unknown to anyone, it continued burning underground... for a week before exploding and burning a chunk of the city.
It would be an implausible plot for a movie.
The guy was so freaked out, he asked ChatGPT and ChatGPT narked on him? So it is no longer "delete your browser history". Now it is "delete your ChatGPT history."