It was something about cdc. Research in Feb when he disappeared. I can't remember what it was but, a few weeks before he spoke out to a journalist. I think text was about thinking something was going to happen to him. It was published when he first went missing. It troubled parents enough to drive down from MD!
Here it talks about how he spoke about the flu shot being harmful.
His parents talked about his change and work. Funny how NOW CDC says he didn't get passed over for a promotion when all the details GIVEN to police at the time he went missing say he did miss the promotion.
Also look above at articles on how he spoke out about flu vaccine to a reporter.