FAQ

When wrapping up a case the player can accuse different suspects, with different results. There is, however, only one correct choice which can be achieved finding a specific set of clues (although the order in which the investigation is performed is up to the player).

It's also possible to correctly solve a crime (i.e. accuse the right culprit) but not get the best ending of that particular case (for example, failing to find out where the criminal is hiding).

Yes, depending on the player's choices and investigative performances throughout the game.