Question
"What you have failed to grasp is that, while all testimony is evidence, not all evidence is testimony"
OK - imagine following:
I decide to type up a letter explaining how I committed a bank robbery. A confession.
I save it on to an encrypted drive.
The police come knocking on my door, cause someone has suggested I was involved.
Now if I gave the police the password to the encrypted drive, am I not incriminating myself (right to silence?).
I am assuming testimony is not just oral?
btw, note it doesn't matter whether I committed the crime or not. I might have, I might not have. I might have just been typing the letter for someone else. I might have a fetish for typing these letters.... Yet, when this letter is taken with any other circumstantial evidence...