They were arrested in El Salvador, likely the charge is "Fuck that person in particular". El Salvador has long since left any semblance of law and order, that's why Trump has become so cozy with them.
I will be absolutely shocked if the person is still alive a year from now. And this also highlights why everyone knew that trying to mount legal defense from El Salvadorian jurisdiction was never going to happen. The country has demonstrated zero compunction with incarcerating people the government doesn't like and indicating that legal rationale isn't needed to justify their actions.
Wow, well that's a take. It's literally some shit you'd hear from Team America: World Police.