There literally are not. Anyone competent enough to be an expert witness will be able to plainly explain to everyone else how statistical analysis obviously delinates the difference between truly random noise and an encrypted volume.
Loll, you have a lot of faith in the legal system that I do not. Expert witnesses are commonly full of shit.
Even if that is true, I have better things to do with my time and money than pay a expert witness to explain: see, I wasn't breaking the law, I just wanted the cops to think I did. That just seems like a really bad idea.
> the difference between truly random noise and an encrypted volume
A LUKS volume with a detached header is indistinguishable from random data.
If there's a difference visible, that's a weakness in the encryption algorithm.
Encrypted data should be statistically indistinct from random noise.
It's an information theory thing. Everything in the ciphertext should be sitting at maximum entropy.