To me, one of the big silver linings of the Simpson trial is the advances we've made in understanding domestic violence as a lethal problem. Before that trial, I think there was a widespread sense that it was a family affair, a normal part of a relationship, not really a crime. The reality is that it's very much a crime, and a very serious one.

Jury instructions are so numerous and complex, it's a wonder jurors ever wade through them. And so it should come as no surprise that they can sometimes get stuck along the way. The instruction on circumstantial evidence is confusing even to lawyers. And reasonable doubt? That's the hardest, most elusive one of all.

As I listened to the verdicts in the Casey Anthony case, acquitting her of the homicide of her baby girl, I relived what I felt back when court clerk Deirdre Robertson read the verdicts in the Simpson case. But this case is different. The verdict is far more shocking. Why? Because Casey Anthony was no celebrity.

Marcia Clark Quotes