It was a number of factors.
- He had a dream team of five defense attorneys whom he paid each $5,000 per day on a case that lasted over eight months.
- The prosecution dropped the ball many, many times.
- "If the glove don't fit, you must acquit." The glove itself had been wet with blood from the time of the murder, but subsequently shrunk slightly after drying. His attorneys advised him to stop taking his arthritis medication for a couple of weeks before that day, so that his hand would swell. He also wore a latex glove before putting on the actual glove.
- The case was extremely well documented by the media, and OJ's attorneys managed to find a few clips, out of 100s of hours, which showed the forensic team not using proper sterile technique (no gloves). This was one of the ways that they were able to undermine the credibility of the investigation.
- Mark Furman, one of the lead detectives on the case, had his character assassinated because he had sued the LAPD for not letting him retire because he himself alleged that he could no longer properly perform his job in law enforcement because he had become a racist after years on the force.
- The racial climate in LA at the time was extremely tense after the Rodney King scandal, as well as the death of Latasha Harlins.
- The jurors had unanimously decided that OJ was innocent after only hours of deliberation, which for an eight month case is absolutely preposterous. The rule of thumb, according to Johnny Cochran, was one day of jury deliberation for each week of the trial.
- Many of the jurors were black themselves and later admitted to finding OJ innocent as revenge for Rodney King, as well as the desire to return to their families after spending eight months isolated at the hotel for the sake of the trial. Also, it was later revealed that one of the older black, male jurors was a former Black Panther who at the time that they announced his innocence.
