> "Presumption of innocence" is not a principle that extends outside of US borders so its always difficult to contextualize police action in other countries to Americans who take their constitution for granted.

Sorry, what? Within America, that principle ultimately derives from English common law (from which the legal systems of most former colonies are derived). Moreover, it is a specific part of the European Convention on Human Rights, to which all EU members are party.

Of course it doesn't necessarily apply everywhere in the world (though it'd be foolish to expect any legal doctrine to apply universally, although in this case the doctrine is part of the Universal Declaration of Human Rights, which makes it about as close to universal law as is possible) - but it clearly extends beyond the borders of the US (and in fact, the notion of it 'extending beyond the borders' is pretty offensive, as it suggests the US as the origin of the principle).