Nathan, it does not hold water. Planting evidence may make sense in low profile cases, because it rests on the assumption that the defendant cannot afford competent defence. But in a high profile case such as OJ? Gimme a break!
I bet you a beer that the OJ jury was more concerned about convicting a celebrity (it borders with impossiblity in the US!) than with any factual evidence.
Besides - planting evidence in drug related cases is extremely easy - all you need to do is to "find" the offending substance in the suspect's trunk or even near the suspect and say you "saw" him dropping it. But it is not so easy to do it in murder cases - especially high profile ones. So before starting to babble about "framing OJ" one needs to ask what would a large law enforcement ORGANIZATION (as opposed to a racist cop) gain from a costly massive effort to "frame" the guy? You do not belive in unbiquitous conspiracy, do you?
wojtek