The checklist suggests a mentally ill, or otherwise challenged individual who was lead or manipulated. It seems really strange to carry a list with you that details the clothing you are supposed to be wearing. Who does that? Checklists are used in many situations when people are doing something complicated and mistakes are possible, but if you need a list of what clothes to wear unless it is your first day on the junior hockey league then you probably have some challenges, and are not some kind of criminal or terrorist mastermind.
If you look at the checklist, it’s a writing style of a 5th grader. Supposedly a guy with no social media accounts. Gamer, I suspect.