Is it acceptable to have a subplot run out of sync in front of the main plot by a couple of days and hide that fact from the reader until near the end, where it then becomes synced with the main plot? Or will the reader feel cheated?
The time difference distances the subplot character from the crime scene. That subplot is the story of the character's journey to the crime. As the story advances, the reader will realise they have been following this character two days before the crime happened and that the character had been at the crime all along.
The genre is Crime/Mystery, and the reader will get clues or evidence pointing to the subplot character while the detective investigates the scene.
Acceptable? or will the reader feel cheated out of clues or information?