There's not necessarily anything wrong with prosecuting him in the US, but presumably the US authorities could've just as well spared themselves the work and referred this to the UK authorities in whose jurisdiction the crimes were committed.
Taken to the extreme with this logic he should be extradited across the globe for decades for any public prosecutor to go to town on, though I guess that type of fear is exactly the intended effect of witch trial justice.
The situation in reverse with a US citizen charged in a foreign country despite causing no harm to them is unlikely to garner the same response. American exceptionalism at it's finest.
Now that I'm thinking about it more, I'd be upset if they didn't arrest him while he were here.
In fact, the DOJ press release specifically names a bunch of countries that aren't the US https://www.justice.gov/usao-edwi/pr/man-charged-his-role-cr...
>According to publically available information, since it was created, Kronos has been configured to exfiltrate user credentials associated with banking systems located in Canada, Germany, Poland, France, and the United Kingdom, among others countries.
Of course, given the nature of the malware it's very likely that at least someone in the US was affected.
How is this a problem? if you cause material damages to Americans and you then go to the US the country is going to come after you.
Why would the US not protect its citizens to the best of its ability and prosecute people who harmed them, even if they harmed them from a place that wasn't the US. We're talking about global financial crimes, they don't know any borders to begin with.
If you kill someone outside of the US, and then you travel to the US, I'd be concerned if you wouldn't get arrested
I could be wrong, but I don't think the federal government has ever claimed that any Americans were infected with Kronos.
It's a stretch.
World police strikes again.