Tonight, you will. Did Nicole Brown Simpson actually predict her own death . What she said to us was oj is gonna kill me and hes gonna get away with it. Reporter what really went on in the jury room . Not guilty of a crime of murder. All people wanted to do was go home. And, in a frank, new interview, prosecutor marcia clark answers the most important question of all. Reporter how did you not convict this guy . Reporter well also hear from oj simpson himself who told his story under oath in these explosive deposition tapes. If her face was black and blue the next day or two days later i was responsible for it. Reporter and now questions at oj simpsons old house. Obviously there is a lot of attention to this. Reporter the oj simpson case, two decades later. Im lester holt and this is dateline. Heres josh mankiewicz. Reporter june 12, 1994, brentwood, california. Two horrific murders that came to be defined by just three o. J. , please surrender immediately. Orenthal james simpson. I hav