Is Edgar Allan Poe an unreliable narrator in the poem 'The Raven'?

First of all, Edgar Allan Poe is not the narrator of the story, he is the author, make sure you make that distinction. Montressor is the narrator of the story, he's the one telling his close friend of what happened with Fortunato. Montressor can be considered an unreliable narrator because fifty years has passed and he is an old man now who has obviously cooled off about the whole situation. He also may be considered an unreliable narrator because he is so tricky throughout the story that maybe he's manipulating the reader.