Final answer:
An involved party or law enforcement officer should fill out an incident report after a collision involving a DUI charge or where the vehicle requires towing, as it's a legal and ethical responsibility.
Step-by-step explanation:
In the context of a traffic collision, particularly one involving a DUI charge or significant damage where the vehicle must be towed, the individual responsible for filling out an incident report is typically an involved party or a law enforcement officer. An incident report serves as an official record of the events that took place during the accident and can be crucial for insurance claims, legal proceedings, and establishing fault. Based on the ethical perspective of William David Ross, as mentioned in FIGURE 9.6, one might also argue that there is a moral imperative, or prima facie duty, to assist after witnessing such an accident, which may include providing testimony or participating in the reporting process if necessary.