Harry death theory

They have been showing kid Brian a lot in the background and his habits. With that one scene when the man asked for the chair we assume maybe that is Brian.

Do you think Brian is the one who ends up killing Harry?

His way of setting Dexter free and also getting revenge on Harry for not adopting him as well.

I know it's stated Harry killed himself what if Brian forced him to take the pills. Or told him off yourself or I'm letting everyone know about you and Dexter. Seeing how I'm sure he's been stalking and watching most of this happen. Especially the Harry gun scene in the street.

Just a fun theory haha thanks for letting me share.