Who is at fault if someone runs a red light causing you to rear end the person in front of you who stopped short to avoid the person who rand the red light?
The person who ran the red light would be at fault for causing the initial collision. However, you could potentially be held partially at fault for the rear-end collision, as you are typically expected to maintain a safe following distance to allow for sudden stops. Insurance companies and the police report will determine the final liability based on the details of the accident.