That's the train of thought of a conspiracy theorist. He had the fake ID that was used to check-in at the hostel; he had the gun, or one or even multiple similar types; he had a manifesto. You should read up on shapes and camera perspectives.
https://www.zerohedge.com/political/person-interest-nyc-assassination-being-questioned-police-pa
they have fingered someone, but honestly, you'd have to be blind to think that this is the same guy, much less pointy chin line
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