DUI manslaughter investigations are carried out by the more veteran law enforcement officers that are normally trained in traffic homicide investigations. Those officers will generally work with a team of officers during the investigation at the scene of a traffic homicide to determine different aspects of calculations of driving pattern, speed, points of impact, and what exactly took place during that accident, because it has resulted in the most severe of consequences, that being the loss of life.
They put that together in a traffic homicide report that a lot of times can take months for law enforcement to finalize, taking each piece of evidence that they gather and thoroughly documenting the same. Those are the individuals that are investigating a DUI manslaughter and how they do it.