I was just thinking about something after the finale - how did an intelligent, extremely savvy, able-bodied multi-millionaire end up in the prison for junkies, psychos and dead-meat? A prison that's nowhere near his mansion and yacht? In what universe does that begin to make sense?
I'm guessing he's a response to the fact that the first three (two?) African-American actors were killed off and that it was mocked as old-school mentality towards African-American actors, notably in zombie movies. That it doesn't make any sense is completely irrelevant, what we now have is a key character that is African-American.
I recognize it's not politically correct to point that out, but I'd gamble that's the reason he's on there and he'll survive quite a while.