For me the issue with the post it note, and how it talks about 'evidence' is that it doesn't feel like the way an innocent person might think about being falsely accused. IMO.
JMO, but if someone accused me of a crime, I feel like I'd say 'No! I didn't do that! Why do you think I did ? What has caused you to accuse me?'
My instinct wouldn't be to say 'there isn't any evidence' because... well.. how would I know? If you've been accused of something you didn't do, then you're going to assume there IS evidence, which has mistakenly implicated you. And you would desperately want to hear it/see it: 'What is the evidence? Why do you think this?'
How would an innocent person 'know' there is no evidence? You'd be afraid that there WAS evidence! Being accused is scary. You'd worry that somehow, there was 'evidence' that implicated you, even while knowing that you didn't do anything wrong.
Whereas... A guilty person might know that they have gone to all possible lengths to conceal evidence/not leave an evidence trail and might therefore more confidently be able to say 'they have no evidence' [even if they are mistaken due to superiority complex or similar. Some criminals eg Narcissistic psychopaths have a tendency to believe they are cleverer than everyone else] [not saying LL is one, just using that as an example].
Not to say that there isn't another explanation, but for me that's why it's firing off suspicious feelings in my instinct/reaction brain.