My total guess, and this is obviously completely just my amateur opinion, is that the perp is someone they were remotely acquainted with through their star wars group(s). That person took a dislike to them for whatever reason and enacted some revenge. This person is highly disturbed and probably has paranoid delusions. I am guessing that when the perp is caught and Sergio learns the name, he will react with WTH? The person probably never even blipped on his radar. Just my guess.
I too agree with you. The person will have a giant personality disorder and will be a grievance collector. I think the perp is wearing a disguise and did some planning, all of it serving the purpose of nursing some narcissistic injury. It's very scary, but people have been known to shoot up schools or workplaces over fairly minor triggers (to the rest of us). People get shot or knifed in bars and even stores over things that would be "road rage" if they were in their cars.
An offhand comment combined with, say, a perceived slight in some kind of cosplay or workplace context, could be enough for some people to go off the rails. Whether this same person will do something similar, again, remains to be seen. I sense "deranged stalker." Workplace stalker is a strong option (such a person might know she had an annual garage sale).
Lower on my list of possibilities would be deranged neighbor (who certainly would have had to steal or rent a car, I'd think).
BTW, my 2008 Toyota truck has a key that can be copied for $10 and has no chip. You can't lock and unlock the doors automatically, obviously, but you can unlock all the doors with two clicks. I think Nissans are the same way. Borrowing a truck from out of town is another possibility (if the person is smart). We have had criminal neighbors (thieves and drug dealers) who held down good jobs that required a more than ordinary amount of intelligence and responsibility. In the case of the thieves, I eventually learned that they had actually stolen from their own children. Almost every semester, I have a student who ends up having stuff stolen by a family member (sometimes a car, sometimes a bike, sometimes textbooks).
I believe the perp is male based on body proportions, but there's no way to be completely sure. Walked pretty confidently in what appear to be white boots. I've read most of the thread but didn't see a discussion about shoe style, beyond a couple of other people thinking they were white boots (I'd say they have 3 inch heels, but would love to hear others' opinions).
