interpol can

I’m don’t have a degree in law but it’s kinda hard to arrest someone who is in North Korea.

Originally posted by Xero_Daxter:

I’m don’t

weren't u 'merican

A country refusing to extradite doesn't mean they won't cooperate with law enforcement from another nation.

Generally speaking all that is required for co-operation between national law enforcement is that the actions committed by the suspect are criminal in both jurisdiction.
So if country A sends the details of the suspect to law enforcement from country B but selling drugs on the internet (or rather the particular drugs in question as that varies hugely between states) is not illegal in country B then no, the suspect won't be arrested.
If it's illegal in both nations then the suspect would most likely be arrested and generally speaking law enforcement would extend a bit of courtesy to those that tipped them off, by allowing agents from country A to be present at the moment of the arrest, the press conference and so forth.

Extradition comes later on, when the suspect is already in custody and law enforcement has usually very little to do with the process at that point since it is largely in the hands of the courts (and depending on the nation, the Foreign Ministry).
And the fact that the law enforcement from the two country collaborated isn't always a guarantee that the suspect (or convicted, since extradition can also apply to people that have already received a sentence) will be extradited, even in the presence of a treaty to that effect.
Plenty of time European courts have refused the extradition of suspects to the USA on the ground that the state asking for it maintained the death penalty for the offense alleged and did not offer guarantee that it would not be inflicted.
But that doesn't mean that EU jurisdictions do not cooperate with the USA.


But to answer your question, no, outside of extremely specific (and mildly weird) cases, law enforcement agents from a country do not have any authority to conduct arrest or other forms of law enforcement in another country.
One of those specific cases would be the Vatican; despite it being a sovereign nation, Italian police is allowed to conduct law enforcement within its borders - I believe unless the target of their enforcement is a Vatican citizens, in which case jurisdiction falls back to the Gendarmeria.

If they want it bad enough the get CIA to merc them.

Maybe countries have extradition agreements with the US. So yeah, especially if what they are doing is a crime in their own country too, which it probably is if they're trying to hide their activities.

I suppose for the perpetrator of the crime it really just depends.

Which country would they rather spend their prison time in?

Originally posted by WarHeRo:

Originally posted by Xero_Daxter:

I’m don’t

weren't u 'merican

Oops. I had a brain fart. My bad. Haha.

Originally posted by Shadow-79:

Can the FBI still arrest those via the darknet if they live outside the USA?

Not generally. However, they could refer such cases to the CIA. Which could then petition another country to allow them to be arrested.

The darkweb is to be avoided. At best, you'll find what you want at an excessive price. At worst you will get jail prison time and a huge fine.