i'm amy robach. >> i'm david muir.ave a great evening and a great weekend. >>> next on abc 7 news at 11:00, an explosion at a chemical plant in santa clara forces neighbors to shelter in place. how fir

i'm david muir. >> and i'm amy robach. from all of us at "20/20" and abc news, good night.

i'm amy robach.

amy robach. always great to be with you in the morning. >>> let's turn to our chief legal analyst. you. >> i used to work here. >> great to have you. we all know the book you wrote, "run of his life, the people versus o.j. simpson," jeffrey, good to have you. why do this now? what's the point? >> i think o.j. simpson loved being a celebrity far more than any other celebrity i ever encountered. he would spend his days at the brentwood county shopping mall in los angeles where he would greet his public. he just loved being in the public eye and greeting people and he's trying to recapture that, notwithstanding the fact that most people including me think he killed ron goldman and nicole brown. >> you make the point he craves attention. does he think he can change minds here? >> i don't think so. he's 73 years old. i think he recognizes people -- what most people think about him. a lot of people are interested in him. when he goes out in public a lot of people want to take selfies. i don't know all of them are doing it out of affection. some of them might be doing it out of bizarre cu