Based on what I've read, Sims' actions were clearly wrong and just plain stupid. Nobody in this situation can claim ignorance. Whether the card was found, stolen or just magically appeared, you don't use someone else's credit card without their permission.
Frankly, I'm kind of shocked at some of the responses in this thread. Granted, I don't know what was purchased, the amount or in what matter, but it doesn't matter. You just plain and simple can't be this stupid.
Now, he may be able to plea this down to a lesser charge and perhaps through the course of the investigation/trial, the circumstances will change surrounding the facts of the case, but at this point, Sims may never suit up for ISU again, and if that happens, I'm completely fine with it.
I'm not trying to be the moral police and my opinion matters about as much as a three pound turd, but I just can't believe Sims would be so careless and engage in such a stupid act when he has/had so much potentially in front of him. I really do hate that we may never see him again and it's beyond frustrating just how much this defense might suffer without him, but people have to learn from their mistakes and be held accountable for their actions, and this is a lot more serious than getting a public intoxication or something of the sort.
Addition: Just wanted to add that I'll be fine with whatever decision the coaching staff makes, but this is very disappointing.