I wouldn't expect Horton back this year. Smoke abounds. I guess they're sending a message or whatever... and I really don't have anywhere near enough information to declare whether this is the correct thing or not. I didn't want to link to it but elsewhere on the internet there was confident speculation that Horton, uh, needs to get his crap together in a major way.
The net impact will probably be nil, since this season was going nowhere fast. The main thing here is for Horton to straighten out his life and come back as a senior and give himself a degree and a career. Also, playing good basketball would be nice.
Update: DOTMAN confirms.