The video doesn't prove or disprove whether he had a gun in his pants

And yet this is one of the key pieces of evidence "proving" that Tyler smuggled a gun onto the roof. Hilarious. "You can't prove he didn't have a gun" becomes evidence that "he had a gun."

A guy that's at the location, acting suspicious, with motive, said he did it

If Tyler actually confessed to his family or to police in person, this would hold a lot of weight. Notes and obviously faked text messages are worthless.