Cnote has good points, i doubted the verdict after I looked at the evidence form the trial. The blood on the sock was shown to have been planted. I also know that as soon as OJ showed up the detectives put him in handcuffs, even though he had every right to be there. I think most people made up their minds as soon as her murder was announced.
The blood on the sock wasn't planted. Its not humanly possible to place blood on a sock the same way it was when they found it.
There is tons of evidence that wasn't even used in the trial which was a mistake on the Prosecutions part. They did a horrible job and lost that case due to poor decision making.