It's not a defense I'm looking to provide. I'm only attempting to determine what could have caused Kei to act like this...

But if it's about coercion or persuasion, I can't tell you any more than I already have. If Kei was speaking to anyone privately, then he was doing it very, very carefully. I didn't notice anything strange about him in the time leading up to this morning, nor did I see him speaking with anyone.