If the claim is true, I'd expect them to have used either those models or Grok or similar.
Of course if I was the FBI, I would make it so hackers trying to breach the system get a honeypot where all the data is fake, and with LLMs (even poor ones) it would be very easy to fake an entire alternative reality.
How about putting some cash bounty flags out there in dedicated mock systems.. and maybe allow the public to attempt cyber breaches with the same impunity that anonymous perpetrators enjoy.
Of course if I was the FBI, I would make it so hackers trying to breach the system get a honeypot where all the data is fake, and with LLMs (even poor ones) it would be very easy to fake an entire alternative reality.