Report came from Traffic Investigators, not college degrees. Traffic Investigators go to Traffic Investigation school(same school as mainland Traffic investigators go), conduct investigations, ascertain factors to include release of factors causing accident and deaths. You don't need a college degree to figure out that a person not wearing his or her seatbeat involved in a high speed collision will be ejected  causing blunt force injury and death, in most cases. All you need now is pronouncement and ID which they got fairly quickly. Smaller police departments with properly trained personnel will conclude investigations faster then larger police departments. In addition to a traffic investigation unit, they also have their own forensics unit to assist traffic - cause of death,  identification of the deceased, which means quicker release of information to media. Nothing to do with college degrees.