Within the context of intentionally violating the law -- meaning if Laura Bush ran the stop sign because she just didn't feel like slowing down, not in the least. I'd still go for a manslaughter charge.
If she ran the sign because she did not know of its existence and/or did not see it, THEN I could see her not being charged.
In the case of the woman in the original article, she was speeding. Intentionally violating the law. Her intentional violation of the law resulted in the death of another human being.
Unless I misunderstand definitions, she could actually be charged with second degree murder, correct? My going for manslaughter in this case IS actually taking into account that the death was not intentional and the officer partly to blame.
The fact is, the jury had a different opinion and she walked after paying her traffic fines. A crushing blow, but I'll live.