Unidentified Death Eater stunned by Harry Potter in the Grand Staircase Tower

This idividual was a Death Eater whoh fought in the Battle of Hogwarts in 1998. After the protective encantments around the castle were broken, this man Apparated to the Grand Staircase, which was full of panicking students, among them, Harry Potter. Before the Death Eater could curse anyone, Potter hit him with a Stunning Spell causing him to collide with a pillar. He presumably died from the impact.