I would keep in mind that the incident in which OJ suppposedly saw Nicole Brown having sex was completely separate from the incident of domestic abuse that led to her famous 911 call.
This was NOT the only time OJ was accused of violence, and indeed, in an incident similar to the present one, he threatened to kill former Olympic cyclist Thurlow Rogers when Rogers yelled at his car after OJ cut him off while Rogers was on a training ride. OJ is a bully, plain and simple.
I would also point out that while it is possible that rogue drug dealers murdered Ron Goldman and Nicole, it is equally plausible that aliens teleported themselves to Brentwood and murdered them with space knives, or that angry leprechauns did it.
Let's be honest, the evidence in this case was overwhelming, and the jury never even heard about the fact that, when told he was wanted for questioning, OJ donned a disguise and took off for the Mexican border with $10,000 cash and a handgun (a very poor decision by the prosecutors, in my opinion).