Arnis Zalkalns might be involved in the Alice Gross case, but European arrest warrants are an issue

[youtube https://www.youtube.com/watch?v=gmVa0tL01Bg&w=620&h=315]

That's Alice Gross above, singing "Out Here On My Own" from Fame. She went missing in west London at the end of August -- here are the basic details -- and while police have a primary suspect, a Latvian man named Arnis Zalkalns (who, by the way, previously murdered his own wife), they can'…