have a reasonable doubt. "If it does not fit, you must acquit" was masterful. Whether he did it or not (VERY likely he did) it is a fact that glove did not fit him.
There were also numerous pictures of the cops walking all around the crime scene without booties on their shoes. They contaminated the entire scene.
Also, I remember the medical examiner (I think) saying, whomever committed these crimes would have had a significant amount of blood on them, yet there was just a tiny, tiny smudge on the car door. Now, of course the killer could have simply worn a painter's coveralls and taken them off and placed them into a bag.
Those are just the things that cast reasonable doubt in my mind. But if OJ didn't do it. I think he may have paid someone to do it.