We're not talking about terrorists or Nazis here. Do you really think we'd be sending Seal Team Six to get some guy who scammed the lottery? He didn't even catch federal charges.
Here's an article on using the FBI as more or less another branch of special forces: https://www.washingtonpost.com/world/national-security/insid...
That's not how this works, that's not how any of this works. They don't operate at all outside the US. :)