Although, the investigating officer should gather all information about all parties involved. If the police are not involved, you should take charge. Request the name, address, and phone number of all persons involved in the car accident. Whether they are a driver or a passenger.
Likewise, you should ask for their insurance card and record the information. If there are any witnesses, do get their information. On the off-chance,e your attorney needs to contact them. If the police do show up, you will get a police report number. This allows you to get the police report later on.