Insurance companies conduct a cursory investigation to determine who is at fault in an accident, such as reviewing the accident report, pictures of the accident, and damages to vehicles. However, it is important to remember that insurance companies are for-profit companies. They have a vested interest in minimizing the value of claims against their insured so that they can protect their bottom line. For this reason, it is important that you hire an experienced car accident lawyer who can help prove the other driver was at fault for the accident.