¯\_(ツ)_/¯
This was a state case though. In Harris County court.
There’s Texas state laws about security fraud:
https://statutes.capitol.texas.gov/docs/PE/htm/PE.32.htm
I doubt the federal government deals with all security fraud, it’s a pretty broad category. Probably would have to involve interstate commerce or publicly traded companies to be a federal issue. I am not an expert though.
Even in their public warning they specified concerts specifically. I imagine the private warning to the Russian government was even more specific.