As a Croatian, living in Croatia, I can re-affirm your position. He would get extradited with a complimentary cake for CIA in no time at all. Our ties with US are deeper than the ones with EU, and we are a EU member. Hell, even our chief intelligence officer has dual citizenship (US and Croatian).

Not to mention it isn't like the US and Croatia haven't worked together at least once in apprehending a criminal living in Croatia wanted by the United States.

http://daily.tportal.hr/211771/Ukrainian-hacker-wanted-in-US...

http://www.croatiantimes.com/news/General_News/2012-08-31/29...

American and Croatian police have worked together to arrest Ukrainian hacker Sergei Litvinenko in Croatia, reports Croatian radiotelevision.

Litvinenko was wanted by US federal police for fraud he had committed in the United States. The federal courts had issued a warrant for his arrest and he was caught in Croatia earlier this week.

There is literally no reason why they wouldn't extradite such a highly valued criminal to the US, formal treaty or not. The ties between the two countries are too strong.

Russia has been a member of the Russia-NATO Council since 2002 (see http://en.wikipedia.org/wiki/NATO%E2%80%93Russia_relations).

You don't see them extraditing Snowden, do you? Regardless, despite your lack of tact you claim to know more about Croatia than I do and you dismiss web citations that claim to know more than you so it's pointless to discuss further.

You didn't even read your "web citations" which are actually someone found this Wikipedia page (http://en.wikipedia.org/wiki/List_of_United_States_extraditi...) and put some countries not on it in article form.

If you did, you would find the last one points to this PDF on the US Dept of State Website: http://www.state.gov/documents/organization/71600.pdf which is CHAPTER 209--EXTRADITION of CRIMES AND CRIMINAL PROCEDURE.

That lists Yugoslavia which isn't even a country anymore, but has a note

\1\ For the successor States of Yugoslavia, inquire of the Treaty Office of the United States Department of State.

Croatia is a successor States of Yugoslavia, however, I originally ignored that because I thought I'd have to contact the State Department. Then I decided to see if that info is published. Alright, Lets check out the Treaty Office of the United States Department of State.

Here's the Treaties in Force list.

http://www.state.gov/documents/organization/202293.pdf

Under Croatia it lists

JUDICIAL ASSISTANCE CROATIA — INVESTMENT Agreement on enhancing cooperation in preventing and combating serious crime. Signed at Washington February 16, 2011. Entered into force August 19, 2011. TIAS

That's pretty vague, but there is some agreement there.

You spent a lot of time to simply say, "The US doesn't have an extradition treaty with Croatia."