welcome back to dateline i m natalie morales. after leading los angeles police on a meandering car chase, o.j. simpson announced he was heading to his tony estate in brentwood. the suspect in a double murder, simpson was armed and officers believed dangerous. soon the drama would take a surprising turn, putting more lives at risk. once again, here s josh mankiewicz with chasing o.j. simpson the untold stories. the race to rockingham was on. a s.w.a.t. team convoy versus a ford bronco carrying al cowlings and o.j. simpson just minutes apart. information, advising not to close in on the vehicle. most of us who think we know the simpson story believe that what happened after that surreal