Great question Alireza, Hit and run car accidents and collisions can be devastating and super confusing. Who is responsible? Each case is very specific and so is responsiblity. Getting into a car accident can be the one of the most upsetting events in someone's life. Your life can be permanently, or at least semi-permanently, disrupted by the legal fees, hospital bills, property damage, and psychological and/or emotional distress. The only thing that can possibly make a car accident worse is if you are injured or your property is damaged, and the other person takes off – a so called hit and run accident. If you are looking for a lawyer, I'd suggest consulting with a car accident lawyer at Cohen &Cohen in Washington DC if you need someone in that area.