Interest Stacks

when you have eliminated the impossible, whatever remains, however improbable, must be the truth?

A list of manga about solving a big mystery, solving individual cases that are unrelated to each other or solving individual cases which are linked to solving a bigger mystery.

The mysteries solved are either a mystery to both the protagonist and the reader or just the protagonist with the reader knowing most of what's going on, it may also be a mystery to whoever is trying to solve the mystery which could be supporting characters or the protagonists antagonist.