"Okay, in that case, can you describe to me how it went down ? You look like a guy whose seen more than a few of things happen on the road so you probably know the drill, it sucks and you can get jaded, but I gotta go through it and I got to ask you to go through it with me" The senior officer seems sympathetic. He asks questions about what Frank saw, clues to the state of each driver, and more technical matters of what angle the first vehicle hit the other etc.