My understanding of the event at the time was that having Mr. Simpson try on the gloves was a last second bit of improv at the close of the procecutor introducing them into evidence. Kind of hard to prepare one way or the other for something you don't know is coming.

I don't chose to believe OJ is guiltly of murder, but I understand that that is my preference. I don't like to believe that kind of thing about anybody. Just as people's believing he did do it is their preference. They weren't there. I wasn't there. We can't know. So what we choose to believe says nothing about Mr Simpson. But it does say something about us.