I'm not going to rehash the entire OJ trial or give a comprehensive history lesson but you are wrong. So I'll just say this.
By the time of the OJ trial, DNA evidence had been used in courtrooms for almost a decade. Most people couldn't tell you what "DNA" stood for (most still can't) but they knew DNA evidence was reliable.
Regardless, even if that wasn't true, the jury was educated on the reliability of DNA evidence by experts during the trial and they were instructed they HAD to consider that evidence. They could not ignore it. So, again, the defense decided to cast doubt on the collection and processing of that evidence. Their own experts couldn't downplay the DNA evidence so that's all they had left. They cast the lab as sloppy and the cops as racists who planted evidence. The bloody glove that "didn't fit" (it did but the prosecution failed to set the parameters for how the glove would be demonstrated as being a fit or not) was the key evidence to support their "the cops planted it" theory as opposed to "you can't rely on the DNA evidence."
