I'm totally stuck, even just after talking to Ralph and Bob. I've taken pictures of stuff, I've tried various dialogue orders, I've even tried using the bed... Any hint?
(SPOILER) Have you retrieved a sample of the footprint residue?
But how do you get the sample.
You'll need something to collect it with. Search Rollie's apartment for something suitable.
(SPOILER)
Look inside the cabinets in Roliie's apartment. You'll need those to collect samples.
