What organization is primarily responsible for the investigation of fatal vehicle collisions?

Law enforcement agencies hold the primary responsibility for investigating fatal vehicle collisions. This responsibility encompasses the collection of evidence, determining the cause of the accident, documenting the scene, and interviewing witnesses. They have the legal authority to access information, secure the scene, and take necessary actions related to traffic laws and offenses.

While local fire departments and emergency medical services play crucial roles in responding to and managing incidents, their focus is typically on life-saving and emergency response rather than investigation. Fire departments respond to any fire hazards or extrication needs resulting from a crash, while emergency medical services are primarily focused on providing medical care to the injured. Insurance companies, although involved in assessing damages and claims, do not have the authority or training necessary to conduct formal accident investigations. Their evaluations are based on reports provided by law enforcement and other sources, but they do not conduct the investigations themselves.