User blog comment:BadDesperado/"Swain's" Duel Against Keiram Darkwill/@comment-31656015-20130510090418/@comment-5927074-20130510200529

Yeah, that was the reason people started to believe LB was/is Jarvan IV.

And in Jarvan's judgement, he gets attacked by Swain and they skip the judgement as an apology for what had happened. So they weren't able to see in Jarvan's (/LeBlanc's?) head.