If they cannot find one, then what exactly are they going to present to the public?
Even though Jim's take on this stands in direct opposition to the intellectual curiosity he demanded of himself with the Hino story, I agree agree with everything he's said. Cat went batshit crazy, murdered a shitload of people, then killed himself. The End
They've already exhausted all the usual suspects. He wasn't a Muslim convert, rightwing nutjob, leftwing nutjob, and so on. There was no religious or political motivation behind this attack. Just a batshitter with an arsenal that could supply a small army.
I'm not sure what else we even need to know at this point.