Each crash has its own unique collection of physical evidence that if properly collected and analyzed can often answer the question of how fast a vehicle was traveling. Skid marks, critical speed yaw, 360 momentum are just a few of the many methods used to calculate crash speed. Information gathered from an airbag module can be used to calculate speed and other forces in a crash. A forensic analysis of your crash may be able to provide answers to vehicle speeds and other valuable data. Mr. Anderson is well versed in these principles and can very likely calculate if speed was a contributing factor.