This article discusses techniques for improving vehicular homicide investigations. Proper techniques are described for taking photographs and measurements, completing the diagram and police report, performing skid tests and conducting a damage analysis. Details are provided for examining and preserving evidence at the accident scene through photography and measuring skid marks; determining which occupant was driving; checking the possibility of suicide; recognizing the value of the shoe-sole imprints; conducting a damage analysis, retaining custody of the vehicle; and doing an inventory of the accident vehicles. Involuntary manslaughter, reckless homicide, and drunk driving resulting in death are defined, and relevant statutes are examined. The use of expert opinions in court testimony is discussed; People v. Zimmerman, 385 Michigan 417, 189 N.W.2d 259 (1971) is cited as a comprehensive decision covering the issue.