I am of the opinion that you can rent one roster spot to a kid with some baggage, but only one. It doesn't appear anybody on the current roster has caused problems at prior stops, so if KO decides to roll the dice on Sulaimon, I won't object (though somebody else made the point that this team is absent a veteran leader, which would give me pause).
I'm no psychology major, but if Sulaimon was booted from Duke, there was probably at least some degree of mutual animosity. That isn't to say Sulaimon didn't deserve to be kicked off the team; I'm sure he did. Just that, when things go awry at one destination, it seems to me that human nature would dictate that most people would be more willing to embrace their next stop. There are some people that are beyond help, but we don't know if Sulaimon is one of those players or not - it could be that getting kicked off the team (a team that would go on to win a championship without him, no less) was what he needed to resurrect his career. Ultimately it's all a guessing game, but there is no doubt he's a talented player who could help us win.
Regarding the alleged sexual assault, I have no idea. I am not at all familiar with that incident, but it goes without saying that the program and University doesn't need to be associated with that sort of thing.