Whoever killed them would have been absolutely drenched in blood... not just a splatter or two, but completely covered in blood. OJ had some blood on him, but nothing like would have been on the actual killer.

OJ obviously was there, but it seems unlikely that he did the actual killing. The more likely scenario is that OJ was waiting outside in his Bronco while Rodgers went in to relieve Nicole of the $20k earrings that O.J. wanted back.

OJ surely saw Goldman come up and things go bad... he went in there with a WTF, and left his shoe prints. He left out the front, as his bloody shoe prints show, and Rodgers left out the back. Which was a contradiction the police never explained.

Nobody will know for sure what happened, but the Rodgers version of events fits the evidence perfectly; while trying to make a case against OJ is a bit of a winding road.