Your first priority is to determine whether or not there have been any injuries. In either case, the police should be contacted. When there is an injury, a call to 9-1- 1 would be appropriate to secure medical support for anyone who was injured in the course of the accident.
In addition, as quickly as possible, you should identify any witnesses to the incident. It should not just be ‘the lady with the gray hair and a black car,’ but you should get specifics. You will need some way to identify them, hopefully by a name and telephone number, license plate, so that there can be a follow-up contact.
Often, people take photographs at the scene, but taking pictures with your camera phone may or may not really be in your best interest. If someone is hurt in an accident and they are out there taking pictures, it may seem like they aren’t hurt very seriously.
You should be candid with the police officer at the scene of the accident and tell them exactly what happened. Make certain that the police officer understands the critical parts of the description of the way in which the accident happened: If the other vehicle crossed the centerline, you want to make sure that the police officer thoroughly understands every pertinent detail, because later on it can help your personal injury case.