I think both the good thing and the bad thing about this game is that everything feels pretty hectic - it sort of fits the personality of our detective, and the chaos of the real world situation.
If I were doing this as more of a pure logic game and less for the feel, I would put an ability to rewatch the cutscene (watch footage / remember concert) in the main game, add all the in-game observations to the mouseover text for every item, and make it clear which items belong to which people in the box stage.
Love the concept, even if the box thing feels like a real stretch... You could beat this game satisfactorily without the literal box existing at all.