I don't know what the law is in other states, but in Massachusetts, if the car in front of you stops suddenly and you rear-end it, you are considered 100% at fa

I don't know what the law is in other states, but in Massachusetts, if the car in front of you stops suddenly and you rear-end it, you are considered 100% at fault. (Unless you can prove that the other car stopped with the intent to cause an accident. Good luck with that.)