Lindsay cracking cases and knowing things is hardly new or limited to this season. I'd love it if she were the one to shoot Casey :lol:, that`s probably my favourite scenario, but -- as hesitant as I am to say this after "Vacation" -- I`d hope it actually pays out in a good and realistic way. We know she wasn`t in the room with the others when it faded to black, and I didn`t exactly see any secret passages in Lucy`s room for her to go through. I didn`t even see her pull out a gun. So I might have a little issue if in the S7 opener, she`s somehow materialized in the room and gotten off a shot against Casey before he (the one we know has a gun) has had time to shoot anyone.
That`s why I`m still iffy about Lucy. And Danny, though it seems redundant to shoot him again (although if they did, it could be their chance to do the follow-up they never really did in S6). ETA: Lindsay too, for that matter, although if she materializes into the room just to get shot before the others, well, same issue as above.
It occurs to me, though, that there might`ve been a point behind Lindsay mentioning their "overpriced, two-bedroom apartment". Maybe there is a passageway. The two rooms being directly connected, or connected through a bathroom. (Though why Danny wouldn`t take that route to Lucy`s bedroom when he woke up...)