Played through the whole investigation and made an accusation. Real note.
The good: the systems cross-reference cleanly, and the 5-record case file makes you commit before you understand. The moment I saw the room sensor was the only record that could break Inez's statement, after I'd already spent slots on the access and camera logs, was the best beat here.
The friction, and it's a real one: nothing tells you a pinned record can be unpinned. The only hint is "click a record to retain." I filled 5/5 with the wrong records and assumed my case was locked. Clicking a pinned record again does drop it, but I found that by accident, and only after two "insufficient evidence" results with no visible way forward.
Second: after "insufficient evidence" the return button drops you back on the occupancy tab. That's a good hint, but it's so quiet I read it as "go back and look around" rather than "your proof set is wrong." One explicit line, like "the contradiction needs a record of the room's state," would have kept me in the case instead of out of it.
I stopped after the second wall. I would replay with a clean case file, but the game doesn't make it obvious that starting over is the intended move.