Toobin thinks that Chris Darden blew the case by asking OJ to try on the glove. Marcia Clark (the book "Without a Doubt") also appears.
There is also the issue of Simpson's being taped at an exercise studio two weeks before and bragging about "wife beating".
Update: January 24
CNN aired a prequel, "O.J.'s Wild Ride: 20 Years Later", covering the low-speed chase of OJ's Bronco by the LAPD. I remember watching some of that live.