Who is at fault on a multiple rear-end collision car 1 is a stop then rear-ended by car 2 claim that car 3 hits then ran off?

Car 2 is liabile for the first collision and must pay for Car 1's damages and injuries. Car 3 is At Fault for hitting Car 2 and for the rear end damage to Car 2. This is because each vehicle is responsible for maintaining a safe distance between them and the vehicle in front of them in order to allow them to stop safely.