To my knowledge the police in Germany is not allowed to lie to you during interrogations in the sense you put it. https://dejure.org/gesetze/StPO/136a.html htt

To my knowledge the police in Germany is not allowed to lie to you during interrogations in the sense you put it. https://dejure.org/gesetze/StPO/136a.html https://dejure.org/gesetze/StPO/136a.html According to this law, deception is a prohibited interrogation method. No idea how this is handled in practice and what the loopholes are. I have a vague memory of a confession in Switzerland being invalidated because of this, but can't find a source at the moment.