Answer:
Witness information and video held by uninvolved businesses can be lost quickly, making prompt witness canvassing and requests to preserve footage especially important.
Although trucking cases involve evidence-preservation rules, some important information can still disappear quickly after a truck crash.
Witness lists may be incomplete, and known witnesses may identify others who saw the collision. Prompt canvassing can help locate those people.
Nearby businesses may also have surveillance that is routinely overwritten. The video identifies witness information and third-party video as priorities for early investigation.