However, the consequences of not talking can vary wildly. In some countries, police might torture you. Some countries might hold silence against you or even punish you for withholding exculpatory information.
Yeah.
Police use torture even here in the US.
Italy is infamous for trying people over and over for the same offense until they get a conviction.
Cops and prosecutors will use the tools available to them, the specifics of the tools varying a lot by local history and governance traditions.
And as the US population currently finds out, what's written in a constitution is not worth much when there is inadequate rule of law (and the US constitution offers comparatively few protections as is).