The emails certainly need to be looked into.
Many of them seem to be between two guys, and it is hard to tell if they are talking simulator issues or aircraft issues.
At one point one of the guys is reaching out to the other, appearing to have concern about his mental health and offering support. They were clearly friends.
At one point one of the friends asked the other a serious question - the answer was NO!
I find it hard for that question & answer to be taken in more than one way between friends.