The law is a bit complicated. I did give up my password when they threatened my wife. The judge ruled they obtained my password by coercion so they weren't permitted to use it. But then they came forward and said they would have eventually cracked my encryption anyway as they can crack 2048-bit AES easily, and even if they couldn't have cracked the encryption they would have unsoldered the chips (which chips?) and put them in another device and got access that way. The judge said in that case you can use the password you got through coercion because you would have got in anyway. That is allowed by the law, in the USA at least.