I don't know the circumstances of Toby's private life, but you could be on to something about living in Las Vegas, Ghost.
The ESPN writer Kieran Mulvaney spent almost a year in Las Vegas researching a book, and he told me that while he was active on the fight scene he said he could see how Vegas could be a lonely place for a lot of people.
I can see this, too.
I don't know what Toby's situation was, but if a person is, for whatever reason, of a solitary disposition or simply on his/her own, Vegas probably isn't the place to be. Everywhere you look, people having fun (or seeming to be so doing), couples gazing into each other's eyes, lovers embracing, and then to go back to a lonely apartment -- or just an unsatisfactory personal life -- I don't know, it must bring everything home that bit harder.
As said, I know nothing of Toby's life but I would guess that for some people the reality of living in Vegas can be a lot different from the glittering image.
Yes, Frank, I believe that Mitch was involved in a love affair that was going badly wrong.
It seems trite in light of the Toby situation to bring up the old saying about suicide being a permanent solution to a temporary problem, but sometimes I think this is all too terribly true. Again, a very sad day.