In addition to license plate details, make, model and year of their vehicle, and insurance information, also note apparent age range, gender, any visible conditions that could have impacted driving ability, observations of irrational behavior, presence of passengers who might serve as witnesses, smells suggesting alcohol consumption, and any statements made about causes or fault. Question police offers about sobriety assessments done and their determinations on causation. An attorney incorporates findings to prove negligence and liability where warranted.