This is so neat! I think I softlocked myself by showing the papers to CC after I'd already been told where the perp is. That unchecked my to-do box and it can't be re-checked. I'm replaying the game now to see if I can speedrun it and if I can get in after that, or if I am still missing a step.
Edit: Yep, that did the trick! I now had a new to-do to confront him in the bathroom. :)