Anybody with half a brain knows what happened. The only evidence that was missing was a bloody OJ himself standing over a dead Nicole.
There is deep irony, in that long before the murders, when the first Terminator movie was on the drawing boards, OJ had been considered for the title role. At the time, he was coming off the Naked Gun TV show and was showing some comedic chops. James Cameron rejected Simpson as the Terminator remarking that Simpson would not make a convincing killer.