I don't know if we can discover two bottom weapons on that screencapture, but it's good game anyways.
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You can! So, like, there's an entire "Confront" button that I and some of my friends missed out on our first few attempts. Once you gather all the evidence you can find and talk to everyone about all topics, you can hit the Confront button to move on to the next segment. Eventually you will discover those weapons.