If you don't give access to law enforcement when they ask: straight to jail. Encryption is irrelevant in that situation. If they see the encrypted volume you need to provide them access.
Precisely, unless there is plausible deniability that a blob of data is indeed an encrypted file they can just hold you in jail until you comply. There are encryption schemes that provide plausible deniability, but implementing would probably not be trivial.
Classic $5 wrench.
Having thugs on speed dial opens a lot of doors.
So if an app installs an encrypted volume for which you don't have the password to, you go to jail? That doesn't make sense. How can they know if I have the password or not
Maybe in a country like the UK, but not in the US. The Fifth Amendment protects against self-incrimination.
Which covers divulging encryption keys because it is treated the same as compelling you to give up the combination to a wall safe which is testimonial and protected.