Well, I would say that your brother is more at fault here. His vehicle had foward motion. Saying that the door only damaged the rear portion of the van doesn't really say anything, other than the fact that a) the front part of the van body is tapered and b) the door was already opening when he pulled into the stall. If I had to guess, I'd say your brother was not completely attentive when he was pulling into the stall. I say the door was probably already opening because it caused damage more to the rear of the vehicle and because the driver obviously did not see the vehicle pulling into the stall in the side view mirror. He also should have noticed a person in that vehicle in the first place and been hesitant to pull into the stall until the driver made a move. I'm guessing he never even saw the driver sitting in the seat of the other vehicle. It's kind of like when someone rear ends someone else. It's always the person driving the vehicle with the frontal damage that says the person with the rear end damage was at fault for using their brakes. Every time, the driver with frontal damage gets the ticket for inattentive driving or following to close. I'm guessing that your brother being young and inexperienced has a slightly different view of what occurred on scene and is just a little bit scared about the consequences of it all. If you weren't there and you're basing your post on his side of the story, we're already getting an inaccurate picture of what happened on scene.