This is where my innate skepticism comes in. Suddenly snapping, dissociative fugue and amnesia, IMO, are clever plots in fiction but are very very rare. If they even exist. I think a person can use them as an excuse, because they allow the person to disavow responsibility for certain actions, and recover their previously-pure entity.
The comments about Hannah Upp are intriguing. She broke her "fugue" by jumping into the water and being dramatically rescued and cured at the same time, in NYC.
IMO, Hannah Upp's "normal" was not the norm before she did what she did.
Also, I believe it is possible that Steven's mental break began quite some time before his car wound up in SCA. The driving, the long pauses when speaking, the inability to organize his thoughts and himself enough to find a better job. All of those things are indicative of some type of mental crisis, IMO.
If something happened at a meeting, I think it wasn't a "meeting" (so to speak) and was a crime against Steven. Something like that could cause him mental harm or worse.
I believe Steven is either somewhere well-off, or with us no longer. I think he'd ask for help at some point, in some way, otherwise.
I don't believe there actually was any meeting or interview. Maybe Steven just believed there was.
As you know, I believe he is still with us.....somewhere. And either isn't clear-headed enough to find help or has gotten it from someone who doesn't know he's "missing."