So, mean, you just deny to explain me why this ship was banned with proper evidence? Who said that you are not were just anrgy about this ship's pilot in some private reasons and banned the ship?
Isn't the sanction purpose, actually, to punish the rule violator, not the random people?
I'm pretty sure that the man who were flying that ship left a bit later after this incident, and by the time sanction was processed he clearly was not able to notice it. Otherwise i would know it from the chats.
The only way to contact the actual violator is checking chat logs on the evidence screenshots, if they even exist, of course.