Intriguing story; character development and POV are a mess!
I feel like this could have been an incredible book, because the storyline truly is interesting! Telling us "who dun it" in the very first chapter, and then watching the various characters bumble their way toward what we the readers already know? What a unique approach.
HOWEVER... (my three-star review should have told you that was coming!) The characters were a mess. I had a terrible time keeping track of whose perspective each page was from, what the difference was between the many characters, and what role each was supposed to play in the book. I had to let my brain fill in that "someone" did such-and-such because names like Williams and Paxton and Long and Carlisle meant nothing to me.
The author would do good to go back and choose one to three characters MAX whose perspective to tell the story from, and then actually develop those characters. (Also, go talk to an actual autistic person for a moment, then knock it off with the offensive stereotypes and straight-up inaccuracies in the book; autism isn't a learning disability, neither are autists "narcissistic.") If such a revision was published, I'd definitely go back and read it again.