do あなた know who this guy is?

I seriously doubt the casting director/producer etc would of let a Death Eater who is ment to be dead appear in the Epiloge. It might just be an extra that's been in other films

It is unlikely, but it could be one of those weird movie things, like the crewman on Wizard of Oz that hung himself and あなた could see his body hit the backdrop (yellow brick road scene). Also, the lighting isn't the greatest

Well the wizard of oz thing isn't true, and it doesn't even relate

My sources (which I will not reveal) are very reliable. あなた must be thinking of the guy that hung himself from one of the 林檎, アップル trees. It does relate, if あなた think about it. It'ss a weird thing about the movie that no one really catches unless it's pointed out