Can you suggest some mystery/detective stories like this (details inside)?

The protagonist is accused of a crime they didn’t commit (most preferably murder, and they have to prove their innocence. And optional: after the protagonist discovers the culprit, there are plausible reasons for the culprit not to be bring to justice (like the evidence the protagonist finds can’t be summitted to the police, the classic “you find it, but you can’t prove it”).

Short stories, novels and novella are welcome.

Can you help me with that?