I'd say for the insanity plea there would have to be a certain amount of spontaneity about it. Serial killers are mostly methodical people who do plan their actions ahead of time, which is why the insanity plea won't work.
From what I've heard, it doesn't seem like the shooter in this instance had things planned.
From what I've heard, it doesn't seem like the shooter in this instance had things planned.
I don't know though, lots of questions.